Double-Magic Nature of 132Sn and 208Pb through Lifetime and Cross-Section Measurements

被引：53

作者：

Allmond, J. M. ^{[1
]}

Stuchbery, A. E. ^{[2
]}

Beene, J. R. ^{[3
]}

Galindo-Uribarri, A. ^{[3
,4
]}

Liang, J. F. ^{[3
]}

Padilla-Rodal, E. ^{[5
]}

Radford, D. C. ^{[3
]}

Varner, R. L. ^{[3
]}

Ayres, A. ^{[4
]}

Batchelder, J. C. ^{[6
]}

Bey, A. ^{[4
]}

Bingham, C. R. ^{[3
]}

Howard, M. E. ^{[4
,7
]}

Jones, K. L. ^{[4
]}

Manning, B. ^{[7
]}

Mueller, P. E. ^{[3
]}

Nesaraja, C. D. ^{[3
]}

Pain, S. D. ^{[3
]}

Peters, W. A. ^{[8
]}

Ratkiewicz, A. ^{[7
]}

Schmitt, K. T. ^{[3
]}

Shapira, D. ^{[3
]}

Smith, M. S. ^{[3
,4
]}

Stone, N. J. ^{[4
,9
]}

Stracener, D. W. ^{[3
]}

Yu, C. -H. ^{[3
]}

机构：

[1] Oak Ridge Natl Lab, JINPA, Oak Ridge, TN 37831 USA

[2] Australian Natl Univ, Dept Nucl Phys, Canberra, ACT 0200, Australia

[3] Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA

[4] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA

[5] Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City 04510, DF, Mexico

[6] Oak Ridge Associated Univ, UNIRIB, Oak Ridge, TN 37831 USA

[7] Rutgers State Univ, Dept Phys & Astron, New Brunswick, NJ 08903 USA

[8] Oak Ridge Associated Univ, Oak Ridge, TN 37830 USA

[9] Univ Oxford, Dept Phys, Oxford OX1 3PU, England

来源：

PHYSICAL REVIEW LETTERS | 2014年 / 112卷 / 17期

基金：

美国国家科学基金会; 澳大利亚研究理事会;

关键词：

SHELL NUCLEUS SN-132; 1P SHELL; SPECTROSCOPY; STATES; BE-9; ENERGIES; CARBON; HRIBF; DECAY;

D O I：

10.1103/PhysRevLett.112.172701

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Single-neutron states in Sn-133 and Pb-209, which are analogous to single-electron states outside of closed atomic shells in alkali metals, were populated by the (Be-9, Be-8) one-neutron transfer reaction in inverse kinematics using particle-gamma coincidence spectroscopy. In addition, the s(1/2) single-neutron hole-state candidate in Sn-131 was populated by (Be-9, Be-10). Doubly closed-shell Sn-132 (radioactive) and Pb-208 (stable) beams were used at sub-Coulomb barrier energies of 3 MeV per nucleon. Level energies,gamma-ray transitions, absolute cross sections, spectroscopic factors, asymptotic normalization coefficients, and excited-state lifetimes are reported and compared with shell-model expectations. The results include a new transition and precise level energy for the 3p(1/2) candidate in Sn-133, new absolute cross sections for the 1h(9/2) candidate in Sn-133 and 3s(1/2) candidate in Sn-131, and new lifetimes for excited states in Sn-133 and Pb-209. This is the first report on excited-state lifetimes of Sn-133, which allow for a unique test of the nuclear shell model and Sn-132 double-shell closure.

引用

页数：6

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