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Title: Magnetic moment and lifetime measurements of Coulomb-excited states in Cd 106

Journal Article · · Physical Review C
 [1];  [1];  [2];  [3];  [4];  [1];  [5];  [6];  [7];  [8];  [7];  [6];  [3];  [6];  [7];  [9];  [7];  [7];  [7];  [6] more »;  [3];  [6] « less
  1. Rutgers Univ., New Brunswick, NJ (United States)
  2. Univ. Bonn, Bonn (Germany)
  3. Univ. Nacional de Colombia, Bogota D.C. (Columbia)
  4. Millsaps College, Jackson, MS (United States)
  5. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  6. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  7. Univ. of California, Berkeley, CA (United States)
  8. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Berkeley, CA (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  9. Univ. of California, Berkeley, CA (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

The Cd isotopes are well studied, but experimental data for the rare isotopes are sparse. At energies above the Coulomb barrier, higher states become accessible. Purpose: Remeasure and supplement existing lifetimes and magnetic moments of low-lying states in Cd106. In an inverse kinematics reaction, a Cd106 beam impinging on a C12 target was used to Coulomb excite the projectiles. The high recoil velocities provide a unique opportunity to measure g factors with the transient-field technique and to determine lifetimes from lineshapes by using the Doppler-shift-attenuation method. Large-scale shell-model calculations were carried out for Cd106. The g factors of the 21+ and 41+ states in Cd106 were measured to be g(21+)=+0.398(22) and g(41+)=+0.23(5). A lineshape analysis yielded lifetimes in disagreement with published values. The new results are τ(Cd106;21+)=7.0(3)ps and τ(Cd106;41+)=2.5(2)ps. The mean life τ(Cd106;22+)=0.28(2)ps was determined from the fully-Doppler-shifted γ line. Mean lives of τ(Cd106;43+)=1.1(1)ps and τ(Cd106;31-)=0.16(1)ps were determined for the first time. The newly measured g(41+) of Cd106 is found to be only 59% of the g(21+). This difference cannot be explained by either shell-model or collective-model calculations.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP)
Grant/Contract Number:
AC05-00OR22725; AC02-05CH11231; AC52-07NA27344
OSTI ID:
1324208
Alternate ID(s):
OSTI ID: 1319969; OSTI ID: 1377478
Journal Information:
Physical Review C, Vol. 94, Issue 3; ISSN 2469-9985
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 10 works
Citation information provided by
Web of Science

References (14)

Magnetic Moments of States in 110 Sn. journal June 2016
Magnetic moments of short-lived excited nuclear states: measurements and challenges journal July 2007
Z = 50 core stability in Sn 110 from magnetic-moment and lifetime measurements journal April 2016
Electric quadrupole moments of the 2 1 + states in Cd 100 , 102 , 104 journal November 2009
The Shell-Model Code NuShellX@MSU journal June 2014
Particle-rotor versus particle-vibration features in g factors of Cd 111 and Cd 113 journal March 2016
Nuclear Data Sheets for A = 106 journal April 2008
Measured g factors and the tidal-wave description of transitional nuclei near A = 100 journal May 2011
On the robustness of surface vibrational modes: case studies in the Cd region journal April 2010
Transition from collectivity to single-particle degrees of freedom from magnetic moment measurements on 38 82 Sr 44 and 38 90 Sr 52 journal June 2014
Velocity dependence of the dynamic magnetic field acting on swift O and Sm ions journal May 1980
Breakdown of vibrational motion in the isotopes Cd 110 116 journal October 2008
Magnetic properties of even nuclei journal May 1966
First g -factor measurements of the 2 1 + and the 4 1 + states of radioactive 100 Pd journal October 2011

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