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Collective excitati...
Collective excitations of Ru-96 by means of (p, p 'gamma) experiments
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Hennig, A. (författare)
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Ahn, T. (författare)
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Anagnostatou, V. (författare)
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visa fler...
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Blazhev, A. (författare)
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Cooper, N. (författare)
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Derya, V. (författare)
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Elvers, M. (författare)
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Endres, J. (författare)
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Goddard, P. (författare)
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- Heinz, Andreas Martin, 1967 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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Hughes, R. O. (författare)
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Ilie, G. (författare)
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Mineva, M. N. (författare)
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Petkov, P. (författare)
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Pickstone, S. G. (författare)
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Pietralla, N. (författare)
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Radeck, D. (författare)
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Ross, T. J. (författare)
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Savran, D. (författare)
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Spieker, M. (författare)
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Werner, V. (författare)
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Zilges, A. (författare)
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visa färre...
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(creator_code:org_t)
- 2015
- 2015
- Engelska.
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Ingår i: Physical Review C - Nuclear Physics. - 2469-9985 .- 2469-9993. ; 92:6
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Abstract
Ämnesord
Stäng
- Background: One-phonon mixed-symmetry quadrupole excitations are a well-known feature of near-spherical, vibrational nuclei. Their interpretation as a fundamental building block of vibrational structures is supported by the identification of multiphonon states resulting from a coupling of fully-symmetric and mixed-symmetric quadrupole phonons. In addition, the observation of strong M1 transitions between low-lying 3(-) and 4(+) states has been interpreted as an evidence for one-phonon mixed-symmetry excitations of octupole and hexadecapole character. Purpose: The aim of the present study is to identify collective one-and two-phonon excitations in the heaviest stable N = 52 isotone Ru-96 based on a measurement of absolute M1, E1, and E2 transition strengths. Methods: Inelastic proton-scattering experiments have been performed at the Wright Nuclear Structure Laboratory (WNSL), Yale University, and the Institute for Nuclear Physics (IKP), University of Cologne. From the acquired proton-gamma and gamma gamma coincidence data we deduced spins of excited states, gamma-decay branching ratios, and multipole mixing ratios, as well as lifetimes of excited states via the Doppler-shift attenuation method (DSAM). Results: Based on the new experimental data on absolute transition strengths, we identified the 2(+) and 3(+) members of the two-phonon mixed-symmetry quintuplet (2(1,ms)(+) circle times 2(1,s)(+)). Furthermore, we observed strong M1 transitions between low-lying 3(-) and 4(+) states suggesting one-phonon symmetric andmixed-symmetric octupole and hexadecapole components in their wave functions, respectively. The experimental results are compared to sdg-IBM-2 and shell-model calculations. Conclusions: Both the sdg-IBM-2 and the shell-model calculations are able to describe key features of mixed-symmetry excitations of Ru-96. Moreover, they support the one-phonon mixed-symmetry hexadecapole assignment of the experimental 4(2)(+) state.
Ämnesord
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
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Hennig, A.
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Ahn, T.
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Anagnostatou, V.
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Blazhev, A.
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Cooper, N.
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Derya, V.
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visa fler...
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Elvers, M.
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Endres, J.
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Goddard, P.
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Heinz, Andreas M ...
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Hughes, R. O.
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Ilie, G.
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Mineva, M. N.
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Petkov, P.
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Pickstone, S. G.
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Pietralla, N.
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Radeck, D.
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Ross, T. J.
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Savran, D.
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Spieker, M.
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Werner, V.
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Zilges, A.
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visa färre...
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