@inproceedings{782c71bc3f7345dd9e72d4499caf7dc1,

title = "Symmetry of isoscalar matrix elements and systematics in the sd and beginning of fp shells",

abstract = "A careful determination of the lifetime and measurement of the branching ratio for decay of the first 2 T=1 + state in 42Sc has allowed an accurate experimental test of charge independence in the A = 42 isobaric triplet. A lifetime of 69(17) fs was measured at the University of Kentucky, while relative intensities for the 975 keV and 1586 keV transitions depopulating the first 2 T=1 + state have been determined at the University of Cologne as 100(1) and 8(1), respectively. Both measurements give an isoscalar matrix element, M 0, of 6.4(9) (W.u.) 1/2. This result confirms charge independence for the A=42 isobaric triplet. Shell model calculations have been carried out for understanding the global trend of M 0 values for A = 4n + 2 isobaric triplets ranging from A = 18 to A = 42. The 2 1(T=1) +→0 1(T=1) + transition energies, reduced transition probabilities and M 0 values are reproduced to a high degree of accuracy. The trend of M 0 strength along the sd shell is interpreted in terms of the shell structure. Certain discrepancies arise at the extremes of the sd shell, for the A = 18 and A = 38 isobaric triplets, which might be explained in terms of the low valence space at the extremes of the sd shell.",

keywords = "Charge independence, Isoscalar matrix elements, Shell model, Transition strengths",

author = "Orce, {J. N.} and P. Petkov and V. Vel{\'a}zquez and Mckay, {C. J.} and Lesher, {S. R.} and S. Choudry and M. Mynk and A. Linnemann and J. Jolie and {Von Brentano}, P. and V. Werner and Yates, {S. W.} and Mcellistrem, {M. T.}",

year = "2006",

month = mar,

day = "13",

doi = "10.1063/1.2187841",

language = "English",

isbn = "0735403139",

series = "AIP Conference Proceedings",

pages = "96--100",

booktitle = "CAPTURE GAMMA-RAY SPECTROSCOPY AND RELATED TOPICS",

note = "12th International Symposium on Capture Gamma-Ray Spectroscopy and Related Topics ; Conference date: 04-09-2005 Through 09-09-2005",

}