Coulomb excitation of 124,126,128Sn(Z = 50)

Journal Article · Sat Jan 01 04:00:00 EST 2011 · Physical Review C

OSTI ID:1032811

Allmond, James M ^[1]; Radford, David C ^[1]; Baktash, Cyrus ^[1]; Batchelder, J. C. ^[2]; Gross, Carl J ^[1]; Hausladen, Paul ^[1]; Lagergren, Karin B ^[1]; Larochelle, Y. ^[3]; Padilla-Rodal, Elizabeth ^[1]; Yu, Chang-Hong ^[1]

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1. ORNL
2. Oak Ridge Associated Universities (ORAU)
3. University of Tennessee, Knoxville (UTK)

High-precision measurements of <0_1||E2||2_1> matrix elements from the Coulomb excitation of 124,126,128Sn(Z = 50) impinging on a 12C target are presented. The <0_1||E2||2_1> matrix elements and related B(E2) values decrease monotonically as the N = 82 shell closure is approached from N = 74 to 78, despite a near constancy in the first 2+ level energy, E(2_1+). Furthermore, results are presented for the Coulomb excitation of 124,126,128Sn using an enriched 50Ti target, which, combined with the results from the 12C target, provide a measure of the <2_1||E2||2_1> matrix elements and related static quadrupole moments, Q(2_1+) (expected to be ~0 for a spherical shape). These new results indicate that the Sn isotopes have a deformation consistent with zero. The present study marks the first report on measured 2_1+ static quadrupole moments for the unstable Sn isotopes.

• Research Organization: Oak Ridge National Laboratory (ORNL); Holifield Radioactive Ion Beam Facility
• Sponsoring Organization: SC USDOE - Office of Science (SC)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1032811
• Journal Information: Physical Review C, Journal Name: Physical Review C Journal Issue: 061303 Vol. 84; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CLOSURES
COULOMB EXCITATION
Coulomb Excitation
DEFORMATION
MATRIX ELEMENTS
QUADRUPOLE MOMENTS
SHAPE
TARGETS