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Article ; Online: Mass, Spectroscopy, and Two-Neutron Decay of ^{16}Be.

Monteagudo, B / Marqués, F M / Gibelin, J / Orr, N A / Corsi, A / Kubota, Y / Casal, J / Gómez-Camacho, J / Authelet, G / Baba, H / Caesar, C / Calvet, D / Delbart, A / Dozono, M / Feng, J / Flavigny, F / Gheller, J-M / Giganon, A / Gillibert, A /

Hasegawa, K / Isobe, T / Kanaya, Y / Kawakami, S / Kim, D / Kiyokawa, Y / Kobayashi, M / Kobayashi, N / Kobayashi, T / Kondo, Y / Korkulu, Z / Koyama, S / Lapoux, V / Maeda, Y / Motobayashi, T / Miyazaki, T / Nakamura, T / Nakatsuka, N / Nishio, Y / Obertelli, A / Ohkura, A / Ota, S / Otsu, H / Ozaki, T / Panin, V / Paschalis, S / Pollacco, E C / Reichert, S / Rousse, J-Y / Saito, A T / Sakaguchi, S / Sako, M / Santamaria, C / Sasano, M / Sato, H / Shikata, M / Shimizu, Y / Shindo, Y / Stuhl, L / Sumikama, T / Sun, Y L / Tabata, M / Togano, Y / Tsubota, J / Uesaka, T / Yang, Z H / Yasuda, J / Yoneda, K / Zenihiro, J

Physical review letters

2024 Volume 132, Issue 8, Page(s) 82501

Abstract: The structure and decay of the most neutron-rich beryllium isotope, ^{16}Be, has been investigated following proton knockout from a high-energy ^{17}B beam. Two relatively narrow resonances were observed for the first time, with energies of 0.84(3) and 2. ...

Abstract	The structure and decay of the most neutron-rich beryllium isotope, ^{16}Be, has been investigated following proton knockout from a high-energy ^{17}B beam. Two relatively narrow resonances were observed for the first time, with energies of 0.84(3) and 2.15(5) MeV above the two-neutron decay threshold and widths of 0.32(8) and 0.95(15) MeV, respectively. These were assigned to be the ground (J^{π}=0^{+}) and first excited (2^{+}) state, with E_{x}=1.31(6) MeV. The mass excess of ^{16}Be was thus deduced to be 56.93(13) MeV, some 0.5 MeV more bound than the only previous measurement. Both states were observed to decay by direct two-neutron emission. Calculations incorporating the evolution of the wave function during the decay as a genuine three-body process reproduced the principal characteristics of the neutron-neutron energy spectra for both levels, indicating that the ground state exhibits a strong spatially compact dineutron component, while the 2^{+} level presents a far more diffuse neutron-neutron distribution.
Language	English
Publishing date	2024-03-08
Publishing country	United States
Document type	Journal Article
ZDB-ID	208853-8
ISSN	1079-7114 ; 0031-9007
ISSN (online)	1079-7114
ISSN	0031-9007
DOI	10.1103/PhysRevLett.132.082501
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Article ; Online: Quasifree Neutron Knockout Reaction Reveals a Small s-Orbital Component in the Borromean Nucleus ^{17}B.

Yang, Z H / Kubota, Y / Corsi, A / Yoshida, K / Sun, X-X / Li, J G / Kimura, M / Michel, N / Ogata, K / Yuan, C X / Yuan, Q / Authelet, G / Baba, H / Caesar, C / Calvet, D / Delbart, A / Dozono, M / Feng, J / Flavigny, F /

Gheller, J-M / Gibelin, J / Giganon, A / Gillibert, A / Hasegawa, K / Isobe, T / Kanaya, Y / Kawakami, S / Kim, D / Kiyokawa, Y / Kobayashi, M / Kobayashi, N / Kobayashi, T / Kondo, Y / Korkulu, Z / Koyama, S / Lapoux, V / Maeda, Y / Marqués, F M / Motobayashi, T / Miyazaki, T / Nakamura, T / Nakatsuka, N / Nishio, Y / Obertelli, A / Ohkura, A / Orr, N A / Ota, S / Otsu, H / Ozaki, T / Panin, V / Paschalis, S / Pollacco, E C / Reichert, S / Roussé, J-Y / Saito, A T / Sakaguchi, S / Sako, M / Santamaria, C / Sasano, M / Sato, H / Shikata, M / Shimizu, Y / Shindo, Y / Stuhl, L / Sumikama, T / Sun, Y L / Tabata, M / Togano, Y / Tsubota, J / Xu, F R / Yasuda, J / Yoneda, K / Zenihiro, J / Zhou, S-G / Zuo, W / Uesaka, T

Physical review letters

2021 Volume 126, Issue 8, Page(s) 82501

Abstract: A kinematically complete quasifree (p,pn) experiment in inverse kinematics was performed to study the structure of the Borromean nucleus ^{17}B, which had long been considered to have a neutron halo. By analyzing the momentum distributions and exclusive ... ...

Abstract	A kinematically complete quasifree (p,pn) experiment in inverse kinematics was performed to study the structure of the Borromean nucleus ^{17}B, which had long been considered to have a neutron halo. By analyzing the momentum distributions and exclusive cross sections, we obtained the spectroscopic factors for 1s_{1/2} and 0d_{5/2} orbitals, and a surprisingly small percentage of 9(2)% was determined for 1s_{1/2}. Our finding of such a small 1s_{1/2} component and the halo features reported in prior experiments can be explained by the deformed relativistic Hartree-Bogoliubov theory in continuum, revealing a definite but not dominant neutron halo in ^{17}B. The present work gives the smallest s- or p-orbital component among known nuclei exhibiting halo features and implies that the dominant occupation of s or p orbitals is not a prerequisite for the occurrence of a neutron halo.
Language	English
Publishing date	2021-03-12
Publishing country	United States
Document type	Journal Article
ZDB-ID	208853-8
ISSN	1079-7114 ; 0031-9007
ISSN (online)	1079-7114
ISSN	0031-9007
DOI	10.1103/PhysRevLett.126.082501
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Article ; Online: General design of the International Fusion Materials Irradiation Facility deuteron injector: source and beam line.

Gobin, R / Blideanu, V / Bogard, D / Bourdelle, G / Chauvin, N / Delferrière, O / Girardot, P / Jannin, J L / Langlois, S / Loiseau, D / Pottin, B / Rousse, J-Y / Senée, F

The Review of scientific instruments

2010 Volume 81, Issue 2, Page(s) 02B301

Abstract: In the framework of the International Fusion Materials Irradiation Facility-Engineering Validation and Engineering Design Activities (IFMIF-EVEDA) project, CEA/IRFU is in charge of the design and realization of the 140 mA cw deuteron Injector. The ... ...

Abstract	In the framework of the International Fusion Materials Irradiation Facility-Engineering Validation and Engineering Design Activities (IFMIF-EVEDA) project, CEA/IRFU is in charge of the design and realization of the 140 mA cw deuteron Injector. The electron cyclotron resonance ion source operates at 2.45 GHz and a 4 electrode extraction system has been chosen. A 2 solenoid beam line, together with a high space charge compensation have been optimized for a proper beam injection in the 175 MHz radio frequency quadrupole. The injector will be tested with proton and deuteron beam production either in pulsed mode or in cw mode on the CEA-Saclay site before to be shipped to Japan. Special attention was paid to neutron emission due to (d,D) reaction. In this paper, the general IFMIF Injector design is reported, pointing out beam dynamics, radioprotection, diagnostics, and mechanical aspects.
Language	English
Publishing date	2010-02
Publishing country	United States
Document type	Journal Article
ZDB-ID	209865-9
ISSN	1089-7623 ; 0034-6748
ISSN (online)	1089-7623
ISSN	0034-6748
DOI	10.1063/1.3257998
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Article ; Online: Metastable States of ^{92,94}Se: Identification of an Oblate K Isomer of ^{94}Se and the Ground-State Shape Transition between N=58 and 60.

Lizarazo, C / Söderström, P-A / Werner, V / Pietralla, N / Walker, P M / Dong, G X / Xu, F R / Rodríguez, T R / Browne, F / Doornenbal, P / Nishimura, S / Niţă, C R / Obertelli, A / Ando, T / Arici, T / Authelet, G / Baba, H / Blazhev, A / Bruce, A M /

Calvet, D / Caroll, R J / Château, F / Chen, S / Chung, L X / Corsi, A / Cortés, M L / Delbart, A / Dewald, M / Ding, B / Flavigny, F / Franchoo, S / Gerl, J / Gheller, J-M / Giganon, A / Gillibert, A / Górska, M / Gottardo, A / Kojouharov, I / Kurz, N / Lapoux, V / Lee, J / Lettmann, M / Linh, B D / Liu, J J / Liu, Z / Momiyama, S / Moschner, K / Motobayashi, T / Nagamine, S / Nakatsuka, N / Niikura, M / Nobs, C / Olivier, L / Patel, Z / Paul, N / Podolyák, Zs / Roussé, J-Y / Rudigier, M / Saito, T Y / Sakurai, H / Santamaria, C / Schaffner, H / Shand, C / Stefan, I / Steppenbeck, D / Taniuchi, R / Uesaka, T / Vaquero, V / Wimmer, K / Xu, Z

Physical review letters

2020 Volume 124, Issue 22, Page(s) 222501

Abstract: Here we present new information on the shape evolution of the very neutron-rich ^{92,94}Se nuclei from an isomer-decay spectroscopy experiment at the Radioactive Isotope Beam Factory at RIKEN. High-resolution germanium detectors were used to identify ... ...

Abstract	Here we present new information on the shape evolution of the very neutron-rich ^{92,94}Se nuclei from an isomer-decay spectroscopy experiment at the Radioactive Isotope Beam Factory at RIKEN. High-resolution germanium detectors were used to identify delayed γ rays emitted following the decay of their isomers. New transitions are reported extending the previously known level schemes. The isomeric levels are interpreted as originating from high-K quasineutron states with an oblate deformation of β∼0.25, with the high-K state in ^{94}Se being metastable and K hindered. Following this, ^{94}Se is the lowest-mass neutron-rich nucleus known to date with such a substantial K hindrance. Furthermore, it is the first observation of an oblate K isomer in a deformed nucleus. This opens up the possibility for a new region of K isomers at low Z and at oblate deformation, involving the same neutron orbitals as the prolate orbitals within the classic Z∼72 deformed hafnium region. From an interpretation of the level scheme guided by theoretical calculations, an oblate deformation is also suggested for the ^{94}Se_{60} ground-state band.
Language	English
Publishing date	2020-06-22
Publishing country	United States
Document type	Journal Article
ZDB-ID	208853-8
ISSN	1079-7114 ; 0031-9007
ISSN (online)	1079-7114
ISSN	0031-9007
DOI	10.1103/PhysRevLett.124.222501
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Article ; Online: Surface Localization of the Dineutron in ^{11}Li.

Kubota, Y / Corsi, A / Authelet, G / Baba, H / Caesar, C / Calvet, D / Delbart, A / Dozono, M / Feng, J / Flavigny, F / Gheller, J-M / Gibelin, J / Giganon, A / Gillibert, A / Hasegawa, K / Isobe, T / Kanaya, Y / Kawakami, S / Kim, D /

Kikuchi, Y / Kiyokawa, Y / Kobayashi, M / Kobayashi, N / Kobayashi, T / Kondo, Y / Korkulu, Z / Koyama, S / Lapoux, V / Maeda, Y / Marqués, F M / Motobayashi, T / Miyazaki, T / Nakamura, T / Nakatsuka, N / Nishio, Y / Obertelli, A / Ogata, K / Ohkura, A / Orr, N A / Ota, S / Otsu, H / Ozaki, T / Panin, V / Paschalis, S / Pollacco, E C / Reichert, S / Roussé, J-Y / Saito, A T / Sakaguchi, S / Sako, M / Santamaria, C / Sasano, M / Sato, H / Shikata, M / Shimizu, Y / Shindo, Y / Stuhl, L / Sumikama, T / Sun, Y L / Tabata, M / Togano, Y / Tsubota, J / Yang, Z H / Yasuda, J / Yoneda, K / Zenihiro, J / Uesaka, T

Physical review letters

2020 Volume 125, Issue 25, Page(s) 252501

Abstract: The formation of a dineutron in the ^{11}Li nucleus is found to be localized to the surface region. The experiment measured the intrinsic momentum of the struck neutron in ^{11}Li via the (p,pn) knockout reaction at 246 MeV/nucleon. The correlation ... ...

Abstract	The formation of a dineutron in the ^{11}Li nucleus is found to be localized to the surface region. The experiment measured the intrinsic momentum of the struck neutron in ^{11}Li via the (p,pn) knockout reaction at 246 MeV/nucleon. The correlation angle between the two neutrons is, for the first time, measured as a function of the intrinsic neutron momentum. A comparison with reaction calculations reveals the localization of the dineutron at r∼3.6 fm. The results also support the density dependence of dineutron formation as deduced from Hartree-Fock-Bogoliubov calculations for nuclear matter.
Language	English
Publishing date	2020-12-18
Publishing country	United States
Document type	Journal Article
ZDB-ID	208853-8
ISSN	1079-7114 ; 0031-9007
ISSN (online)	1079-7114
ISSN	0031-9007
DOI	10.1103/PhysRevLett.125.252501
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Article ; Online: 78

Taniuchi, R / Santamaria, C / Doornenbal, P / Obertelli, A / Yoneda, K / Authelet, G / Baba, H / Calvet, D / Château, F / Corsi, A / Delbart, A / Gheller, J-M / Gillibert, A / Holt, J D / Isobe, T / Lapoux, V / Matsushita, M / Menéndez, J / Momiyama, S /

Motobayashi, T / Niikura, M / Nowacki, F / Ogata, K / Otsu, H / Otsuka, T / Péron, C / Péru, S / Peyaud, A / Pollacco, E C / Poves, A / Roussé, J-Y / Sakurai, H / Schwenk, A / Shiga, Y / Simonis, J / Stroberg, S R / Takeuchi, S / Tsunoda, Y / Uesaka, T / Wang, H / Browne, F / Chung, L X / Dombradi, Z / Franchoo, S / Giacoppo, F / Gottardo, A / Hadyńska-Klęk, K / Korkulu, Z / Koyama, S / Kubota, Y / Lee, J / Lettmann, M / Louchart, C / Lozeva, R / Matsui, K / Miyazaki, T / Nishimura, S / Olivier, L / Ota, S / Patel, Z / Şahin, E / Shand, C / Söderström, P-A / Stefan, I / Steppenbeck, D / Sumikama, T / Suzuki, D / Vajta, Z / Werner, V / Wu, J / Xu, Z Y

Nature

2019 Volume 569, Issue 7754, Page(s) 53–58

Abstract: Nuclear magic numbers correspond to fully occupied energy shells of protons or neutrons inside atomic nuclei. Doubly magic nuclei, with magic numbers for both protons and neutrons, are spherical and extremely rare across the nuclear landscape. Although ... ...

Abstract	Nuclear magic numbers correspond to fully occupied energy shells of protons or neutrons inside atomic nuclei. Doubly magic nuclei, with magic numbers for both protons and neutrons, are spherical and extremely rare across the nuclear landscape. Although the sequence of magic numbers is well established for stable nuclei, experimental evidence has revealed modifications for nuclei with a large asymmetry between proton and neutron numbers. Here we provide a spectroscopic study of the doubly magic nucleus
Language	English
Publishing date	2019-05-01
Publishing country	England
Document type	Journal Article
ZDB-ID	120714-3
ISSN	1476-4687 ; 0028-0836
ISSN (online)	1476-4687
ISSN	0028-0836
DOI	10.1038/s41586-019-1155-x
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Article ; Online: Sequential Nature of (p,3p) Two-Proton Knockout from Neutron-Rich Nuclei.

Frotscher, A / Gómez-Ramos, M / Obertelli, A / Doornenbal, P / Authelet, G / Baba, H / Calvet, D / Château, F / Chen, S / Corsi, A / Delbart, A / Gheller, J-M / Giganon, A / Gillibert, A / Isobe, T / Lapoux, V / Matsushita, M / Momiyama, S / Motobayashi, T /

Niikura, M / Otsu, H / Paul, N / Péron, C / Peyaud, A / Pollacco, E C / Roussé, J-Y / Sakurai, H / Santamaria, C / Sasano, M / Shiga, Y / Shimizu, N / Steppenbeck, D / Takeuchi, S / Taniuchi, R / Uesaka, T / Wang, H / Yoneda, K / Ando, T / Arici, T / Blazhev, A / Browne, F / Bruce, A M / Carroll, R / Chung, L X / Cortés, M L / Dewald, M / Ding, B / Dombradi, Zs / Flavigny, F / Franchoo, S / Giacoppo, F / Górska, M / Gottardo, A / Hadyńska-Klęk, K / Korkulu, Z / Koyama, S / Kubota, Y / Jungclaus, A / Lee, J / Lettmann, M / Linh, B D / Liu, J / Liu, Z / Lizarazo, C / Louchart, C / Lozeva, R / Matsui, K / Miyazaki, T / Moschner, K / Nagamine, S / Nakatsuka, N / Nita, C / Nishimura, S / Nobs, C R / Olivier, L / Ota, S / Patel, Z / Podolyák, Zs / Rudigier, M / Sahin, E / Saito, T Y / Shand, C / Söderström, P-A / Stefan, I G / Sumikama, T / Suzuki, D / Orlandi, R / Vaquero, V / Vajta, Zs / Werner, V / Wimmer, K / Wu, J / Xu, Z

Physical review letters

2020 Volume 125, Issue 1, Page(s) 12501

Abstract: Twenty-one two-proton knockout (p,3p) cross sections were measured from neutron-rich nuclei at ∼250 MeV/nucleon in inverse kinematics. The angular distribution of the three emitted protons was determined for the first time, demonstrating that the (p,3p) ...

Abstract	Twenty-one two-proton knockout (p,3p) cross sections were measured from neutron-rich nuclei at ∼250 MeV/nucleon in inverse kinematics. The angular distribution of the three emitted protons was determined for the first time, demonstrating that the (p,3p) kinematics are consistent with two sequential proton-proton collisions within the projectile nucleus. Ratios of (p,3p) over (p,2p) inclusive cross sections follow the trend of other many-nucleon removal reactions, further reinforcing the sequential nature of (p,3p) in neutron-rich nuclei.
Language	English
Publishing date	2020-07-17
Publishing country	United States
Document type	Journal Article
ZDB-ID	208853-8
ISSN	1079-7114 ; 0031-9007
ISSN (online)	1079-7114
ISSN	0031-9007
DOI	10.1103/PhysRevLett.125.012501
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Article ; Online: Erratum: Persistence of the Z=28 Shell Gap Around ^{78}Ni: First Spectroscopy of ^{79}Cu [Phys. Rev. Lett. 119, 192501 (2017)].

Olivier, L / Franchoo, S / Niikura, M / Vajta, Z / Sohler, D / Doornenbal, P / Obertelli, A / Tsunoda, Y / Otsuka, T / Authelet, G / Baba, H / Calvet, D / Château, F / Corsi, A / Delbart, A / Gheller, J-M / Gillibert, A / Isobe, T / Lapoux, V /

Matsushita, M / Momiyama, S / Motobayashi, T / Otsu, H / Péron, C / Peyaud, A / Pollacco, E C / Roussé, J-Y / Sakurai, H / Santamaria, C / Sasano, M / Shiga, Y / Takeuchi, S / Taniuchi, R / Uesaka, T / Wang, H / Yoneda, K / Browne, F / Chung, L X / Dombradi, Z / Flavigny, F / Giacoppo, F / Gottardo, A / Hadyńska-Klęk, K / Korkulu, Z / Koyama, S / Kubota, Y / Lee, J / Lettmann, M / Louchart, C / Lozeva, R / Matsui, K / Miyazaki, T / Nishimura, S / Ogata, K / Ota, S / Patel, Z / Sahin, E / Shand, C / Söderström, P-A / Stefan, I / Steppenbeck, D / Sumikama, T / Suzuki, D / Werner, V / Wu, J / Xu, Z

Physical review letters

2018 Volume 121, Issue 9, Page(s) 99902

Abstract: This corrects the article DOI: 10.1103/PhysRevLett.119.192501. ...

Abstract	This corrects the article DOI: 10.1103/PhysRevLett.119.192501.
Language	English
Publishing date	2018-09-19
Publishing country	United States
Document type	Journal Article ; Published Erratum
ZDB-ID	208853-8
ISSN	1079-7114 ; 0031-9007
ISSN (online)	1079-7114
ISSN	0031-9007
DOI	10.1103/PhysRevLett.121.099902
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Article ; Online: Prominence of Pairing in Inclusive (p,2p) and (p,pn) Cross Sections from Neutron-Rich Nuclei.

Paul, N / Obertelli, A / Bertulani, C A / Corsi, A / Doornenbal, P / Rodriguez-Sanchez, J L / Authelet, G / Baba, H / Calvet, D / Château, F / Chen, S / Delbart, A / Gheller, J-M / Giganon, A / Gillibert, A / Isobe, T / Lapoux, V / Matsushita, M / Momiyama, S /

Motobayashi, T / Niikura, M / Otsu, H / Péron, C / Peyaud, A / Pollacco, E C / Roussé, J-Y / Sakurai, H / Santamaria, C / Sasano, M / Shiga, Y / Steppenbeck, D / Takeuchi, S / Taniuchi, R / Uesaka, T / Wang, H / Yoneda, K / Ando, T / Arici, T / Blazhev, A / Browne, F / Bruce, A M / Carroll, R / Chung, L X / Cortés, M L / Dewald, M / Ding, B / Dombradi, Zs / Flavigny, F / Franchoo, S / Giacoppo, F / Górska, M / Gottardo, A / Hadynska-Klek, K / Korkulu, Z / Koyama, S / Kubota, Y / Jungclaus, A / Lee, J / Lettmann, M / Linh, B D / Liu, J / Liu, Z / Lizarazo, C / Louchart, C / Lozeva, R / Matsui, K / Miyazaki, T / Moschner, K / Nagamine, S / Nakatsuka, N / Nita, C / Nishimura, S / Nobs, C R / Olivier, L / Ota, S / Patel, Z / Podolyák, Zs / Rudigier, M / Sahin, E / Saito, T Y / Shand, C / Söderström, P-A / Stefan, I G / Sumikama, T / Suzuki, D / Orlandi, R / Vaquero, V / Vajta, Zs / Werner, V / Wimmer, K / Wu, J / Xu, Z

Physical review letters

2019 Volume 122, Issue 16, Page(s) 162503

Abstract: Fifty-five inclusive single nucleon-removal cross sections from medium mass neutron-rich nuclei impinging on a hydrogen target at ∼250 MeV/nucleon are measured at the RIKEN Radioactive Isotope Beam Factory. Systematically higher cross sections are found ...

Abstract	Fifty-five inclusive single nucleon-removal cross sections from medium mass neutron-rich nuclei impinging on a hydrogen target at ∼250 MeV/nucleon are measured at the RIKEN Radioactive Isotope Beam Factory. Systematically higher cross sections are found for proton removal from nuclei with an even number of protons as compared to odd-proton number projectiles for a given neutron separation energy. Neutron removal cross sections display no even-odd splitting, contrary to nuclear cascade model predictions. Both effects are understood through simple considerations of neutron separation energies and bound state level densities originating in pairing correlations in the daughter nuclei. These conclusions are supported by comparison with semimicroscopic model predictions, highlighting the enhanced role of low-lying level densities in nucleon-removal cross sections from loosely bound nuclei.
Language	English
Publishing date	2019-05-10
Publishing country	United States
Document type	Journal Article
ZDB-ID	208853-8
ISSN	1079-7114 ; 0031-9007
ISSN (online)	1079-7114
ISSN	0031-9007
DOI	10.1103/PhysRevLett.122.162503
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Article ; Online: Are There Signatures of Harmonic Oscillator Shells Far from Stability? First Spectroscopy of ^{110}Zr.

Paul, N / Corsi, A / Obertelli, A / Doornenbal, P / Authelet, G / Baba, H / Bally, B / Bender, M / Calvet, D / Château, F / Chen, S / Delaroche, J-P / Delbart, A / Gheller, J-M / Giganon, A / Gillibert, A / Girod, M / Heenen, P-H / Lapoux, V /

Libert, J / Motobayashi, T / Niikura, M / Otsuka, T / Rodríguez, T R / Roussé, J-Y / Sakurai, H / Santamaria, C / Shimizu, N / Steppenbeck, D / Taniuchi, R / Togashi, T / Tsunoda, Y / Uesaka, T / Ando, T / Arici, T / Blazhev, A / Browne, F / Bruce, A M / Carroll, R / Chung, L X / Cortés, M L / Dewald, M / Ding, B / Flavigny, F / Franchoo, S / Górska, M / Gottardo, A / Jungclaus, A / Lee, J / Lettmann, M / Linh, B D / Liu, J / Liu, Z / Lizarazo, C / Momiyama, S / Moschner, K / Nagamine, S / Nakatsuka, N / Nita, C / Nobs, C R / Olivier, L / Patel, Z / Podolyák, Zs / Rudigier, M / Saito, T / Shand, C / Söderström, P-A / Stefan, I / Orlandi, R / Vaquero, V / Werner, V / Wimmer, K / Xu, Z

Physical review letters

2017 Volume 118, Issue 3, Page(s) 32501

Abstract: The first measurement of the low-lying states of the neutron-rich ^{110}Zr and ^{112}Mo was performed via in-beam γ-ray spectroscopy after one proton removal on hydrogen at ∼200 MeV/nucleon. The 2_{1}^{+} excitation energies were found at 185(11) keV in ...

Abstract	The first measurement of the low-lying states of the neutron-rich ^{110}Zr and ^{112}Mo was performed via in-beam γ-ray spectroscopy after one proton removal on hydrogen at ∼200 MeV/nucleon. The 2_{1}^{+} excitation energies were found at 185(11) keV in ^{110}Zr, and 235(7) keV in ^{112}Mo, while the R_{42}=E(4_{1}^{+})/E(2_{1}^{+}) ratios are 3.1(2), close to the rigid rotor value, and 2.7(1), respectively. These results are compared to modern energy density functional based configuration mixing models using Gogny and Skyrme effective interactions. We conclude that first levels of ^{110}Zr exhibit a rotational behavior, in agreement with previous observations of lighter zirconium isotopes as well as with the most advanced Monte Carlo shell model predictions. The data, therefore, do not support a harmonic oscillator shell stabilization scenario at Z=40 and N=70. The present data also invalidate predictions for a tetrahedral ground state symmetry in ^{110}Zr.
Language	English
Publishing date	2017-01-20
Publishing country	United States
Document type	Journal Article
ZDB-ID	208853-8
ISSN	1079-7114 ; 0031-9007
ISSN (online)	1079-7114
ISSN	0031-9007
DOI	10.1103/PhysRevLett.118.032501
Database	MEDical Literature Analysis and Retrieval System OnLINE

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