Identification of Excited States in the Tz=+1/2 Nucleus 75Rb: The Quest for Experimental Signatures of Collective Neutron-proton Correlations

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Bibtex

@article{e37df77de6b44645a91a4a6acb57ad0e,
title = "Identification of Excited States in the Tz=+1/2 Nucleus 75Rb: The Quest for Experimental Signatures of Collective Neutron-proton Correlations",
abstract = "Excited states in the T-z-1/2 nucleus Rb-75 were observed for the first time using the Ca-40(Ca-40,alpha p) reaction at 128 MeV. Identification was achieved using events detected by the Daresbury recoil separator in coincidence with gamma rays detected in the 45 element EUROGAM I Ge-detector array. Threefold events were used to build a decay scheme which consists of two rotational bands observed to I-pi=(45+/2) and I-pi=(33-/2). The positive parity band in Rb-75 behaves similarly to a negative-parity band in Kr-74 and contains a region of alignment at (h) over bar omega approximate to 0.75 MeV. These data, and those of Sr-77, be interpreted by treating protons and neutrons separately in a cranked shell model approach despite a recent suggestion for the presence of T=1 neutron-proton pairing correlations in the neighboring self-conjugate, odd-odd Rb-74 ground state band. Our study suggests that some experimental observables such as the energy levels and moments of inertia, may not be able to differentiate between different T=1 pairing phases in these T-z=1/2 nuclei.",
author = "Gross, {C. J.} and Dirk Rudolph and W. Satula and J. Alexander and C. Baktash and ColemanSmith, {P. J.} and Cullen, {D. M.} and Cunningham, {R. A.} and Garrett, {J. D.} and W. Gelletly and A. Harder and Kabadiyski, {M. K.} and I. Lazarus and Lieb, {K. P.} and Roth, {H. A.} and Sarantites, {D. G.} and Sheikh, {J. A.} and J. Simpson and O. Skeppstedt and Varley, {B. J.} and Warner, {D. D.}",
note = "2",
year = "1997",
doi = "10.1103/PhysRevC.56.R591",
language = "English",
volume = "56",
pages = "R591--R595",
journal = "Physical Review C: covering nuclear physics",
issn = "2469-9985",
publisher = "American Physical Society",
number = "2",

}