Nuclear data sheets for A = 155

Lee, M.A.

doi:10.1016/s0090-3752(87)80098-4

Cited by 22 publications

(3 citation statements)

References 121 publications

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“…Empirical values have been obtained in the least-squares fit procedure using a simple rotational formula with three free parameters, namely, the intrinsic energy, the rotational parameter and the decoupling parameter. Experimental energies are taken from [27][28][29] …”

Section: Fragmentation Of the 5/2 + [402] Statementioning

confidence: 99%

Microscopic structures of parity doublets in the151Pm,153Eu and155Eu nuclei

Nosek

Sheline

Sood

et al. 1992

Z. Physik A - Hadrons and Nuclei

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Abstract. Microscopic structures of the proposed parity doublet bands in the odd-proton Z=61 15~Pm and Z = 63 ~53, ~55Eu nuclei are examined using the quasiparticle phonon nuclear model Hamiltonian including the residual pairing and multipole-multipole interactions. Octupole correlations between intrinsic nonrotational states are studied to check the suggested assignments of parity doublet partners in these nuclei. We conclude significant octupole correlations between a pair of K "= 1/ 2 -+ doublets in each of these nuclei, with somewhat weaker correlations between K'= 3/2 + bands in both the Eu isotopes. No octupole connection between the lowest K "= 5/2 -+ bands is found; however, significant octupole collectivity, built on the low-lying 5/2-bands, is predicted in the higher-lying 5/2 + bands which contain the 5/2 + [402] fragmented strength.

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Section: Fragmentation Of the 5/2 + [402] Statementioning

confidence: 99%

Microscopic structures of parity doublets in the151Pm,153Eu and155Eu nuclei

Nosek

Sheline

Sood

et al. 1992

Z. Physik A - Hadrons and Nuclei

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“…The Eu content of the final sample was determined via its activity using three characteristic p-ray transitions of 60, 86.5, and 105 keV [16], which were counted with a calibrated 40cm HPGe detector. The respective line intensities I~a re given in Table I.…”

Section: Sm Andmentioning

confidence: 99%

Stellar (n,γ) cross section of the unstable isotopeEu155

Jaag¹,

Käppeler²

1995

Phys. Rev. C

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The stellar (n, p) cross section of the comparably short-lived isotope Eu (t~y2 = 4.96yr) has been experimentally determined relative to that of gold by means of the activation method. A sample containing only 3.4 x 10 Eu atoms was irradiated for 17 days in a quasistellar neutron spectrum corresponding to a thermal energy of kT = 25 keV. The cross section obtained from the induced activity yields a value of (cr x v) jvT = 1320680mb at kT = 30keV. This result is of relevance for analyzing the abundance pattern in the s-process branchings at A = 151, 152, and 154 with respect to the temperature during helium shell burning in low mass stars.PACS number(s): 25.40.Lw, 82.80. Bg, 27.70. +q, 97.10.Cv

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“…In the following we briefly discuss each of these four cases. It may be remarked that the E4 character of the transitions in Ce and Pb has been experimentally determined based on conversion electron spectroscopy [6,7], whereas it is deduced for Sn [8 -11] and Pb [12] from gamma-ray spectroscopic studies.…”

mentioning

confidence: 99%

Evidence for hexadecapole collectivity in closed-shell nuclei

Sood¹,

Sheline²,

Singh³

1995

Phys. Rev. C

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Evidence for hexadecapole collectivity in closed-shell nuclei is presented by examining the observed characteristics of the lowest 4+ excited state in each case. These 4+ states, presently identified in the N = 82 isotones Sn and Ce, and the Z = 82 isotopes, Pb and Pb, have nanosecond half-lives, and are found to decay by enhanced E4 transitions to the respective 0+ ground state, whereas AI = 2 E2 transitions from, and to, these states have B(E2) values which are only a fraction of a Weisskopf unit. These features, suggestive of a significant one-phonon hexadecapole component in the structure of these 4+ states, are interpreted in terms of their shell model configurations.Similar characteristics are predicted for some other closed-shell nuclei.PACS number(s): 21.60.Ev, 21.10.Re, 21.60.Cs, 23.20.Lv Low-energy spectroscopic studies of even-even nuclei

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Nuclear data sheets for A = 155

Cited by 22 publications

References 121 publications

Microscopic structures of parity doublets in the151Pm,153Eu and155Eu nuclei

Microscopic structures of parity doublets in the151Pm,153Eu and155Eu nuclei

Stellar (n,γ) cross section of the unstable isotopeEu155

Evidence for hexadecapole collectivity in closed-shell nuclei

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