Z = 50 core stability in 110Sn from magnetic-moment and lifetime measurements

Kumbartzki, G. J.; Benczer-Koller, N.; Speidel, K. -H.; Torres, D. A.; Allmond, James M.; Fallon, P.; Abramovic, I.; Bevins, J. E.; Crawford, H. L.; Guevara, Z. E.; Gurdal, G.; Hurst, A. M.; Kirsch, L.; Laplace, T. A.; Lo, A.; Matthews, E. F.; Mayers, I.; Phair, L. W.; Ramirez, F.; Robinson, S. J. Q.; Sharon, Y. Y.; Wiens, A.

doi:10.1103/PhysRevC.93.044316

Title: Z = 50 core stability in ¹¹⁰Sn from magnetic-moment and lifetime measurements

Journal Article · Mon Apr 18 00:00:00 EDT 2016 · Physical Review C

DOI:https://doi.org/10.1103/PhysRevC.93.044316· OSTI ID:1263878

Kumbartzki, G. J. ^[1]; Benczer-Koller, N. ^[1]; Speidel, K. -H. ^[2]; Torres, D. A. ^[3]; Allmond, James M. ^[4]; Fallon, P. ^[5]; Abramovic, I. ^[6]; Bevins, J. E. ^[6]; Crawford, H. L. ^[5]; Guevara, Z. E. ^[3]; Gurdal, G. ^[7]; Hurst, A. M. ^[5]; Kirsch, L. ^[6]; Laplace, T. A. ^[8]; Lo, A. ^[6]; Matthews, E. F. ^[6]; Mayers, I. ^[6]; Phair, L. W. ^[5]; Ramirez, F. ^[3]; Robinson, S. J. Q. ^[7] more »

Rutgers Univ., New Brunswick, NJ (United States)
Univ. Bonn, Bonn (Germany)
Univ. Nacional de Colombia, Bogota D.C. (Columbia)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Univ. of California, Berkeley, CA (United States)
Millsaps College, Jackson, MS (United States)
Univ. of California, Berkeley, CA (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Background: The structure of the semimagic Sn50 isotopes were previously studied via measurements of B(E2;21+→01+) and g factors of 21+ states. The values of the B(E2;21+) in the isotopes below midshell at N = 66 show an enhancement in collectivity, contrary to predictions from shell-model calculations. Purpose: This work presents the first measurement of the 21+ and 41+ states' magnetic moments in the unstable neutron-deficient Sn110. The g factors provide complementary structure information to the interpretation of the observed B(E2) values. Methods: The Sn110 nuclei have been produced in inverse kinematics in an α-particle transfer reaction from C12 to Cd106 projectiles at 390, 400, and 410 MeV. The g factors have been measured with the transient field technique. Lifetimes have been determined from line shapes using the Doppler-shift attenuation method. Results: The g factors of the 21+ and 41+ states in Sn110 are g(21+) = +0.29(11) and g(41+) = +0.05(14), respectively. In addition, the g(41+) = +0.27(6) in Cd106 has been measured for the first time. A line-shape analysis yielded τ(110Sn;21+) = 0.81(10) ps and a lifetime of τ(110Sn;31-) = 0.25(5) ps was calculated from the fully Doppler-shifted γ line. Conclusions: No evidence has been found in Sn110 that would require excitation of protons from the closed Z=50 core.

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Research Organization:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Holifield Radioactive Ion Beam Facility (HRIBF); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP)

Grant/Contract Number:: AC05-00OR22725; AC52-07NA27344; AC02-05CH11231

OSTI ID:: 1263878

Alternate ID(s):: OSTI ID: 1247910; OSTI ID: 1379289

Journal Information:: Physical Review C, Vol. 93, Issue 4; ISSN 2469-9985

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 13 works

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Shape coexistence and collective low-spin states in ${}^{112, 114}{Sn}$ studied with the $(p, p^{'} γ)$ Doppler-shift attenuation coincidence technique Spieker, M.; Petkov, P.; Litvinova, E. Physical Review C, Vol. 97, Issue 5 https://doi.org/10.1103/physrevc.97.054319	journal	May 2018

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