Atomic masses of147m, 148m, 149m Tb,148Dy,150m, 152m Ho derived from decay properties期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

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Atomic masses of147m, 148m, 149m Tb,148Dy,150m, 152m Ho derived from decay properties

Authors:	U J Schrewe H Dornhöfer E Runte W -D Schmidt-Ott P Tidemand-Petersson R Michaelsen

Institution:	1. II. Physikalisches Institut der Universit?t, G?ttingen, Federal Republic of Germany 3. Hahn-Meitner-Institut für Kernforschung, Berlin, Germany

Abstract:	Using nuclear fusion reactions of⁴⁰Ar ions with¹¹²Cd,¹¹⁴Sn and¹¹⁶Sn and subsequentγ-ray spectroscopy, the probability ratios of positron emission and electron capture,β ⁺/EC _k andβ ⁺/(EC+β ⁺), are determined for individualβ-transitions in the decay of^147m,^148m,^149mTb,¹⁴⁸Dy and^150m,^152mHo. From comparison with theoretical ratios the followingQ _EC values, given in keV, are derived:^147mTb, 4.620(60);^148mTb, 5.730(30);^149mTb, 3.610(50);¹⁴⁸Dy, 2.680(30);^150mHo, 6.625(120) and^152mHo, 6.470(80). The present decay-energy data are compared with earlier measurements and the new information obtained for the mass surface around¹⁴⁶Gd is discussed.

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