Half-lives of Sr 73 and y 76 and the consequences for the proton dripline

L. Sinclair; R. Wadsworth; J. Dobaczewski; A. Pastore; G. Lorusso; H. Suzuki; D. S. Ahn; H. Baba; F. Browne; P. J. Davies; P. Doornenbal; A. Estrade; Y. Fang; N. Fukuda; J. Henderson; T. Isobe; D. G. Jenkins; S. Kubono; Z. Li; D. Lubos; S. Nishimura; I. Nishizuka; Z. Patel; S. Rice; H. Sakurai; Y. Shimizu; P. Schury; H. Takeda; P. A. Söderström; T. Sumikama; H. Watanabe; V. Werner; J. Wu; Z. Y. Xu

doi:10.1103/PhysRevC.100.044311

Half-lives of Sr 73 and y 76 and the consequences for the proton dripline

L. Sinclair, R. Wadsworth, J. Dobaczewski, A. Pastore, G. Lorusso, H. Suzuki, D. S. Ahn, H. Baba, F. Browne, P. J. Davies, P. Doornenbal, A. Estrade, Y. Fang, N. Fukuda, J. Henderson, T. Isobe, D. G. Jenkins, S. Kubono, Z. Li, D. LubosS. Nishimura, I. Nishizuka, Z. Patel, S. Rice, H. Sakurai, Y. Shimizu, P. Schury, H. Takeda, P. A. Söderström, T. Sumikama, H. Watanabe, V. Werner, J. Wu, Z. Y. Xu

Physics

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Abstract

The half-lives of seven nuclei have been determined in the neutron-deficient mass-70 region following their production via fragmentation of a 345 MeV/nucleon Xe124 primary beam on a 740 mg/cm2 Be9 target at the RI Beam Factory, RIKEN. The results include two new (Sr73 and Y76) half-lives and a more precise measurement for the ground-state half-life of Sr74. The new results are discussed with reference to previously published calculations that predict the location of the proton dripline in the light Sr and Y region of the nuclear chart. In addition, differences in the ground-state structure of Rb72 and Y76 are discussed with the aid of density functional theory calculations. These provide a possible explanation for why Rb72 undergoes proton decay while the α-conjugate nucleus Y76 predominantly undergoes β+ decay.

Original language	English
Article number	044311
Journal	Physical Review C
Volume	100
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevC.100.044311
State	Published - Oct 16 2019

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Sinclair, L., Wadsworth, R., Dobaczewski, J., Pastore, A., Lorusso, G., Suzuki, H., Ahn, D. S., Baba, H., Browne, F., Davies, P. J., Doornenbal, P., Estrade, A., Fang, Y., Fukuda, N., Henderson, J., Isobe, T., Jenkins, D. G., Kubono, S., Li, Z., ... Xu, Z. Y. (2019). Half-lives of Sr 73 and y 76 and the consequences for the proton dripline. Physical Review C, 100(4), Article 044311. https://doi.org/10.1103/PhysRevC.100.044311

@article{5a98c57cb86c42c9971537085f6e9132,

title = "Half-lives of Sr 73 and y 76 and the consequences for the proton dripline",

abstract = "The half-lives of seven nuclei have been determined in the neutron-deficient mass-70 region following their production via fragmentation of a 345 MeV/nucleon Xe124 primary beam on a 740 mg/cm2 Be9 target at the RI Beam Factory, RIKEN. The results include two new (Sr73 and Y76) half-lives and a more precise measurement for the ground-state half-life of Sr74. The new results are discussed with reference to previously published calculations that predict the location of the proton dripline in the light Sr and Y region of the nuclear chart. In addition, differences in the ground-state structure of Rb72 and Y76 are discussed with the aid of density functional theory calculations. These provide a possible explanation for why Rb72 undergoes proton decay while the α-conjugate nucleus Y76 predominantly undergoes β+ decay.",

author = "L. Sinclair and R. Wadsworth and J. Dobaczewski and A. Pastore and G. Lorusso and H. Suzuki and Ahn, {D. S.} and H. Baba and F. Browne and Davies, {P. J.} and P. Doornenbal and A. Estrade and Y. Fang and N. Fukuda and J. Henderson and T. Isobe and Jenkins, {D. G.} and S. Kubono and Z. Li and D. Lubos and S. Nishimura and I. Nishizuka and Z. Patel and S. Rice and H. Sakurai and Y. Shimizu and P. Schury and H. Takeda and S{\"o}derstr{\"o}m, {P. A.} and T. Sumikama and H. Watanabe and V. Werner and J. Wu and Xu, {Z. Y.}",

note = "Funding Information: We acknowledge the CSC-IT Center for Science Ltd., Finland, for the allocation of computational resources. We also thank James Cubiss for assistance with the final versions of the figures. This work was carried out at the RI Beam Factory (RIBF) operated by RIKEN Nishina Center, RIKEN and Center for Nuclear Study (CNS), University of Tokyo. The work was supported in part by the JSPS KAKENHI Grant No. 25247045 and UK Science and Technologies Facilities Council (STFC) Grants No. ST/M006433/1, No. ST/L005727/1, and No. ST/P003885/1. N.P.L. receives funding from the UK Department of Business Energy and Industrial Stratergy (BEIS) via the NMS programme. Publisher Copyright: {\textcopyright} 2019 American Physical Society.",

year = "2019",

month = oct,

day = "16",

doi = "10.1103/PhysRevC.100.044311",

language = "English",

volume = "100",

journal = "Physical Review C",

issn = "2469-9985",

publisher = "PHYSICAL REVIEW C",

number = "4",

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Sinclair, L, Wadsworth, R, Dobaczewski, J, Pastore, A, Lorusso, G, Suzuki, H, Ahn, DS, Baba, H, Browne, F, Davies, PJ, Doornenbal, P, Estrade, A, Fang, Y, Fukuda, N, Henderson, J, Isobe, T, Jenkins, DG, Kubono, S, Li, Z, Lubos, D, Nishimura, S, Nishizuka, I, Patel, Z, Rice, S, Sakurai, H, Shimizu, Y, Schury, P, Takeda, H, Söderström, PA, Sumikama, T, Watanabe, H, Werner, V, Wu, J & Xu, ZY 2019, 'Half-lives of Sr 73 and y 76 and the consequences for the proton dripline', Physical Review C, vol. 100, no. 4, 044311. https://doi.org/10.1103/PhysRevC.100.044311

TY - JOUR

T1 - Half-lives of Sr 73 and y 76 and the consequences for the proton dripline

AU - Sinclair, L.

AU - Wadsworth, R.

AU - Dobaczewski, J.

AU - Pastore, A.

AU - Lorusso, G.

AU - Suzuki, H.

AU - Ahn, D. S.

AU - Baba, H.

AU - Browne, F.

AU - Davies, P. J.

AU - Doornenbal, P.

AU - Estrade, A.

AU - Fang, Y.

AU - Fukuda, N.

AU - Henderson, J.

AU - Isobe, T.

AU - Jenkins, D. G.

AU - Kubono, S.

AU - Li, Z.

AU - Lubos, D.

AU - Nishimura, S.

AU - Nishizuka, I.

AU - Patel, Z.

AU - Rice, S.

AU - Sakurai, H.

AU - Shimizu, Y.

AU - Schury, P.

AU - Takeda, H.

AU - Söderström, P. A.

AU - Sumikama, T.

AU - Watanabe, H.

AU - Werner, V.

AU - Wu, J.

AU - Xu, Z. Y.

N1 - Funding Information: We acknowledge the CSC-IT Center for Science Ltd., Finland, for the allocation of computational resources. We also thank James Cubiss for assistance with the final versions of the figures. This work was carried out at the RI Beam Factory (RIBF) operated by RIKEN Nishina Center, RIKEN and Center for Nuclear Study (CNS), University of Tokyo. The work was supported in part by the JSPS KAKENHI Grant No. 25247045 and UK Science and Technologies Facilities Council (STFC) Grants No. ST/M006433/1, No. ST/L005727/1, and No. ST/P003885/1. N.P.L. receives funding from the UK Department of Business Energy and Industrial Stratergy (BEIS) via the NMS programme. Publisher Copyright: © 2019 American Physical Society.

PY - 2019/10/16

Y1 - 2019/10/16

N2 - The half-lives of seven nuclei have been determined in the neutron-deficient mass-70 region following their production via fragmentation of a 345 MeV/nucleon Xe124 primary beam on a 740 mg/cm2 Be9 target at the RI Beam Factory, RIKEN. The results include two new (Sr73 and Y76) half-lives and a more precise measurement for the ground-state half-life of Sr74. The new results are discussed with reference to previously published calculations that predict the location of the proton dripline in the light Sr and Y region of the nuclear chart. In addition, differences in the ground-state structure of Rb72 and Y76 are discussed with the aid of density functional theory calculations. These provide a possible explanation for why Rb72 undergoes proton decay while the α-conjugate nucleus Y76 predominantly undergoes β+ decay.

AB - The half-lives of seven nuclei have been determined in the neutron-deficient mass-70 region following their production via fragmentation of a 345 MeV/nucleon Xe124 primary beam on a 740 mg/cm2 Be9 target at the RI Beam Factory, RIKEN. The results include two new (Sr73 and Y76) half-lives and a more precise measurement for the ground-state half-life of Sr74. The new results are discussed with reference to previously published calculations that predict the location of the proton dripline in the light Sr and Y region of the nuclear chart. In addition, differences in the ground-state structure of Rb72 and Y76 are discussed with the aid of density functional theory calculations. These provide a possible explanation for why Rb72 undergoes proton decay while the α-conjugate nucleus Y76 predominantly undergoes β+ decay.

UR - http://www.scopus.com/inward/record.url?scp=85073812338&partnerID=8YFLogxK

U2 - 10.1103/PhysRevC.100.044311

DO - 10.1103/PhysRevC.100.044311

M3 - Article

AN - SCOPUS:85073812338

SN - 2469-9985

VL - 100

JO - Physical Review C

JF - Physical Review C

IS - 4

M1 - 044311

ER -

Half-lives of Sr 73 and y 76 and the consequences for the proton dripline

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