Program - Brookhaven National Laboratory

Z = 8 to Z = 98 nuclei and are compared to theory. A systematic difference of ∼ 5.5% has been identified,
namely theory overestimates experiment. For routine use of the new table with BrIcc [2], we propose to
assign a general uncertainty of 5.5% to the Ω(E) values.
[1] I.M. Band, M.B. Trzhaskovskaya, C.W. Nestor, Jr., P.O. Tikkanen, S. Raman, At. Data Nucl. Data
Tables 81 (2002) 1. [2] T. Kibédi, T.W. Burrows, M.B. Trzhaskovskaya, P.M. Davidson, C.W. Nestor, Jr.,
Nucl. Instr. Meth. in Phys. Res. A 589 (2008) 202. [3] T. Kibédi, M.B. Trzhaskovskaya, M. Gupta, A.E.
Stuchbery, At. Data Nucl. Data Tables 98 (2012) 313. [4] G. Gosselin, P. Morel, Phys. Rev. C 70 (2004)
064603. [5] H.C. Pauli, U. Raff, Comp. Phys. Comm. 9 (1975) 392.
LE 3 4:20 PM
Survey and Evaluation of the Isobaric Analog States
Marion Mac Cormick
Institut de Physique Nucléaire, Orsay, CNRS/Université Paris Sud, 91406 Orsay CEDEX, FRANCE
Georges Audi
CSNSM, CNRS/Université Paris Sud, Bâtiment 108, 91405 Orsay Campus, FRANCE
Aaldert H. Wapstra ∗
NIKHEF, 1009DB Amsterdam, The Netherlands
Isobaric analogue states (IAS) can be used to estimate the mass of nuclei belonging to isobars of the same
isospin multiplet set. The Atomic Mass Evaluation (AME) had previously evaluated the experimental
data used to establish the mass of these states. These masses were also used to establish a semi-empirical
relationship between the members of any given mass multiplet via the isobaric mass multiplet equation,
IMME. The experimental and IMME estimated IAS data have not been published in the AME since 1993
[1]. However, given the recognized importance of isobaric states, it has been decided to reactivate these
IAS studies, initially instigated by Aaldert H. Wapstra. In this conference we describe the reaction data
used to establish the IAS. Cases where reaction data provide a better mass precision as compared to decay
data will be presented. The particular cases of N=Z, T=1 ground states, and fragmented states will also
be discussed. This work is an extension and update of the work carried out by Aaldert H. Wapstra until
2003.
[1] G. Audi, A.H. Wapstra and M. Dedieu, Nucl. Phys. A565(1993) 193-397. ∗ Deceased December 2006.
LE 4 4:40 PM
Systematics of Evaluated Double-Beta Decay Half-Life Times
B. Pritychenko
National Nuclear Data Center, Brookhaven National Laboratory, Upton, NY 11973-5000, USA
A new evaluation of ββ(2ν) half-life values and their systematic are presented. These recommended values
extend the previous evaluation [1] and include analysis of all recent measurements. T 2ν
1/2 ∼ 1/E8 systematic
trend has been observed for 128,130 Te recommended values. Such trend indicates similarities for nuclear
matrix elements in Te nuclei and was predicted for ββ(2ν)-decay mode [2,3]. Current results are compared
with large-scale shell-model calculations and experimental works.
[1] B. Pritychenko, arXiv:1004.3280v1 [nucl-th] 19 Apr 2010. [2] B. Pontecorvo, Phys. Lett. B 26, 630
(1968). [3] H. Primakoff and S.P. Rosen, Phys. Rev. 184, 1925 (1969).
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