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arXiv 0707.3201nucl-ex
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等压多重态质量方程失效的证据:A=35,T=3/2同位旋四重态的研究

Evidence for a breakdown of the Isobaric Multiplet Mass Equation: A study of the A=35, T=3/2 isospin quartet

C. Yazidjian, G. Audi, D. Beck, K. Blaum, S. George, C. Guenaut, F. Herfurth, A. Herlert, A. Kellerbauer, H. -J. Kluge, D. Lunney, L. Schweikhard

摘要:

用ISOLTRAP潘宁阱质谱仪对钾同位素链上的放射性核素进行了质量测量。对于35 K(T_1/2= 178 ms)到46 K(T_1/2= 105 s),相对质量的不确定度为2 × 10 ~(-8)或更好。利用35 K(dm=0.54keV)的精确质量测定,检验了A=35,T=3/2等旋四重态的等压多重态质量方程(IMME)。实验结果表明,偏离一般采用的二次型。

英文摘要:

Mass measurements on radionuclides along the potassium isotope chain have been performed with the ISOLTRAP Penning trap mass spectrometer. For 35K T1/2=178ms) to 46K (T1/2=105s) relative mass uncertainties of 2x10-8 and better have been achieved. The accurate mass determination of 35K (dm=0.54keV) has been exploited to test the Isobaric Multiplet Mass Equation (IMME) for the A=35, T=3/2 isospinquartet. The experimental results indicate a deviation from the generally adopted quadratic form.

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