Identification of a millisecond isomeric state in 129Cd81via the detection of internal conversion and Compton electrons

Taprogge, J.; Jungclaus, A.; Grawe, H.; Nishimura, S.; Xu, Z. Y.; Doornenbal, P.; Lorusso, G.; Nacher, E.; Simpson, G. S.; Soderstrom, P. A.; Sumikama, T.; Kondev, F. G.

doi:10.1016/j.physletb.2014.09.047

Title: Identification of a millisecond isomeric state in 129Cd81via the detection of internal conversion and Compton electrons

Journal Article · Mon Nov 10 00:00:00 EST 2014 · Physics Letters B

DOI:https://doi.org/10.1016/j.physletb.2014.09.047· OSTI ID:1255556

Taprogge, J.; Jungclaus, A.; Grawe, H.; Nishimura, S.; Xu, Z. Y.; Doornenbal, P.; Lorusso, G.; Nacher, E.; Simpson, G. S.; Soderstrom, P. A.; Sumikama, T.; Kondev, F. G.

The decay of an isomeric state in the neutron-rich nucleus 129Cd has been observed via the detection of internal conversion and Compton electrons providing first experimental information on excited states in this nucleus. The isomer was populated in the projectile fission of a 238U beam at the Radioactive Isotope Beam Factory at RIKEN. From the measured yields of γ-rays and internal conversion electrons, a multipolarity of E 3 was tentatively assigned to the isomeric transition. A half-life of T1/2=3.6(2) msT1/2=3.6(2) ms was determined for the new state which was assigned a spin of (21/2+)(21/2+), based on a comparison to shell model calculations performed using state-of-the-art realistic effective interactions.

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Research Organization:: Argonne National Lab. (ANL), Argonne, IL (United States)

Sponsoring Organization:: USDOE Office of Science - Office of Nuclear Physics; National Research Foundation of Korea (NRF)

DOE Contract Number:: AC02-06CH11357

OSTI ID:: 1255556

Journal Information:: Physics Letters B, Vol. 738; ISSN 0370-2693

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

References (22)

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Cited By (4)

First Glimpse of the $N = 82$ Shell Closure below $Z = 50$ from Masses of Neutron-Rich Cadmium Isotopes and Isomers Manea, V.; Karthein, J.; Atanasov, D. Physical Review Letters, Vol. 124, Issue 9 https://doi.org/10.1103/physrevlett.124.092502	journal	March 2020
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Monopole effects, isomeric states, and cross-shell excitations in the $A = 129$ hole nuclei near ${}^{132}{Sn}$ Wang, Han-Kui; Kaneko, Kazunari; Sun, Yang Physical Review C, Vol. 95, Issue 1 https://doi.org/10.1103/physrevc.95.011304	journal	January 2017

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