A precise PKP+ measurement at Z = 55 (I). The mass of 130Cs Academic Article uri icon


  • The Q-value for the 129Xe(3He, d)130Cs reaction is measured to be +5 20 keV. By combining this result with the known neutron separation energy of 130Xe, we derive the total decay energy of 130Cs{A figure is presented}130Xe to beQEC = 2974 20 keV. This value agrees well with two previous positron end-point measurements but disagrees with the corresponding value derived from the 1977 atomic mass evaluation. This has significance in testing the accuracy of the calculated PK P+ ratio for 130Cs decay. The mass excess of 130Cs is derived to be -86908 14 keV. An excited state in 130Cs. was also identified at 121 15 keV with J < 3 and positive parity. The Q-value for 136Xe(3He, d)137Cs was measured to be 1918 12 keV. 1981.

published proceedings

  • Nuclear Physics A

author list (cited authors)

  • Hardy, J. C., Ball, G. C., Davies, W. G., Forster, J. S., Schmeing, H., & Clifford, E.

citation count

  • 4

complete list of authors

  • Hardy, JC||Ball, GC||Davies, WG||Forster, JS||Schmeing, H||Clifford, ETH

publication date

  • April 1981