Inelastic neutron scattering on solid 130XeF2 and 136XeF2 targets was utilized to populate excited levels in 130Xe and 136Xe. When calculating nuclear matrix elements vital to the understanding of double-beta decay, it is important to have a clear understanding of the low-lying level structure of both the parent and daughter nucleus. Of particular relevance to double-beta decay searches are the assignments of 0+ states. We show here that in the case of 130Xe there are several discrepancies in the adopted level structure. We found that one previous 0+ candidate level (1590 keV) can be ruled out and assigned two additional candidates (2223 and 2242 keV). In 136Xe we question the previous assignment of a 0+ level at 2582 keV. Excitation function and angular distribution measurements were utilized to make spin and parity assignments of levels and place new transitions.
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This material is based upon work supported by the U.S. National Science Foundation under Grant no. PHY- 1305801.
This article was a part of a conference, CGS15-Capture Gamma-Ray Spectroscopy and Related Topics in Dresden, Germany, August 25-29, 2014. For more proceedings from this conference, please visit: http://www.epj-conferences.org/articles/epjconf/abs/2015/12/contents/contents.html
Ross, T. J.; Peters, E. E.; Chakraborty, Anagha; Crider, B. P.; Kumar, Ajay; Liu, S. H.; McEllistrem, Marcus T.; Prados-Estévez, Francisco M.; Vanhoy, J. R.; and Yates, Steven W., "“No-Spin” States and Low-Lying Structures in 130Xe and 136Xe" (2015). Chemistry Faculty Publications. 54.