Precision test of the isobaric multiplet mass equation for the A=32, T=2 quintet
Precision test of the isobaric multiplet mass equation for the A=32, T=2 quintet
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DOI：
10.1103/physrevc.80.051302
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发表时间：
2008-10
影响因子：
3.1
通讯作者：
A. Kwiatkowski;B. Barquest;G. Bollen;C. Campbell;D. L. Lincoln;D. Morrissey;G. Pang;A. Prinke
中科院分区：
文献类型：
--
作者：
A. Kwiatkowski;B. Barquest;G. Bollen;C. Campbell;D. L. Lincoln;D. Morrissey;G. Pang;A. Prinke
放射性核素 {sup 32,33}Si 和 {sup 34}P 以及稳定核素 {sup 32}S 和 {sup 31}P 的质量已使用低能束和离子阱 (LEBIT) 彭宁阱质谱仪测量。相对质量不确定性已达到低至 3x10{sup -9}。 {sup 32}Si 的测量质量值与文献值相差四个标准差。 {sup 32}Si 和 {sup 32}S 的精确质量测定已用于测试最著名的 A=32、T=2 同位旋五重奏的等量重态质量方程 (IMME) 的二次形式的有效性。新的实验结果表明该模型发生了巨大的崩溃。
Masses of the radionuclides {sup 32,33}Si and {sup 34}P and of the stable nuclides {sup 32}S and {sup 31}P have been measured with the Low Energy Beam and Ion Trap (LEBIT) Penning trap mass spectrometer. Relative mass uncertainties as low as 3x10{sup -9} have been achieved. The measured mass value of {sup 32}Si differs from the literature value by four standard deviations. The precise mass determination of {sup 32}Si and {sup 32}S have been employed to test the validity of the quadratic form of the isobaric multiplet mass equation (IMME) for the most well known A=32, T=2 isospin quintet. The new experimental results indicate a dramatic breakdown of the model.