Supersymmetry in the spectra of complex atomic nuclei

Abstract

Evidence is observed for the existence of supersymmetry from the study of the odd-odd nucleus ¹⁹⁶Au using the ¹⁹⁷Au($\vec d$, t), ¹⁹⁷Au(p, d) and ¹⁹⁸Hg($\vec d$, α) transfer reactions [1] and combining this with recent information from γγ correlatrion studies [2]. High resolution ¹⁹⁶Pt(p, d) ¹⁹⁵Pt and ¹⁹⁶Pt($\vec d$, t)¹⁹⁵Pt transfer experiments performed in parallel yielded at the same time an improved level scheme of ¹⁹⁵Pt [3]. Using extended supersymmetry, a single fit of the six parameter eigenvalue expression yielded a complete description of all observed low-lying excited states in the four different nuclei forming the supermultiplet. The detailed comparison of the transfer amplitudes for the states up to 500 keV in the odd-odd member of the supermultiplet ¹⁹⁶Au using a semi-microscopic transfer operator provides evidence that this description is correct.