Browsing by Author "Vymers, Preston"
Now showing 1 - 1 of 1
Results Per Page
- ItemStructure of excited states Seen in double beta decay investigated with the 148Nd(3He, nγ)150Sm and 98Mo(3He, nγ)100Ru two proton stripping reactions.(Stellenbosch : Stellenbosch University, 2019-12) Vymers, Preston; Papka, Paul; Sharpey-Schafer, J. F.; Stellenbosch University. Faculty of Science. Dept. of Physics.ENGLISH ABSTRACT: The two proton transfer reaction (3He, nγ) has been measured on two targets 98Mo and 148Nd. High resolution data were taken using the neutron time of flight method and a wall of six NE102A plastic scintillator trigger detectors. These were operated in coincidence with the AFRODITE HPGe detector array to detect the γ-rays that originates from 100Ru and 150Sm. Thus made it possible to investigate the validity of the BCS proton pair stripping approximations. That is assumed in the nuclear matrix element calculations of the QRPA based models, for decays to the ground states of the candidate 0νββ nuclei. A strong proton pair stripping L = 0 transition to the I π = 0+2 spin state of 100Ru has been observed, while non were found for the case of 150Sm due to technical problems. This indicate a breakdown of the BCS proton pairing description in the ground state of 100Ru. In addition the low-lying spin members (I π = 2+1 , 4+1 , 6+1 and 8+1 ) of the yrast bands of both nuclei are clearly visible. Their population are attributed to the single neutron fusion evaporation channels.