Enhanced deformation in light Pr nuclei

B. H. Smith; L. L. Riedinger; H. Q. Jin; W. Reviol; W. Satuła; A. Galindo-Uribarri; D. G. Sarantites; J. N. Wilson; D. LaFosse; S. M. Mullins

doi:10.1016/S0370-2693(98)01337-9

Enhanced deformation in light Pr nuclei

B. H. Smith, L. L. Riedinger, H. Q. Jin, W. Reviol, W. Satuła, A. Galindo-Uribarri, D. G. Sarantites, J. N. Wilson, D. LaFosse, S. M. Mullins

Neutrino Research

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30 Scopus citations

Abstract

We observe for the first time rotational bands of enhanced deformation (ED) in ¹²⁷Pr and ¹²⁸Pr, and suggest that these bands are built upon π g_9/2 ([404]9/2) in ¹²⁷Pr and on the π g_9/2 vh_11/2 orbitals in ¹²⁸Pr. These are the lightest isotopes of Pr for which ED bands have been observed. A contrasting trend in the dynamical moments of inertia (script J sign⁽²⁾) versus N is observed at low frequencies for the "normal-deformed" π h_11/2 and "enhanced-deformed" π g_9/2 bands of ^127-131Pr both experimentally and in self-consistent Woods-Saxon calculations. The trends in script J sign⁽²⁾ and β₂ are correlated with a decreasing probability for pair scattering into the deformation-driving vh_9/2/f_7/2 ([541]1/2) orbital.

Original language	English
Pages (from-to)	89-96
Number of pages	8
Journal	Physics Letters B
Volume	443
Issue number	1-4
DOIs	https://doi.org/10.1016/S0370-2693(98)01337-9
State	Published - Dec 10 1998

Funding

The authors wish to acknowledge important discussions with W. Nazarewicz and M. Riley, and the support of the LBNL operations staff at gammasphere. Support for W. Satuła by the Joint Institute for Heavy Ion Research and the Polish Committee for Scientific Research (KBN) (contract no. 2-P03B-040-14) is greatly appreciated. This work is funded by the US Department of Energy through contracts no. DE-FG02-96ER40983 (University of Tennessee) and DE-FG05-88ER40406 (Washington University). ORNL is managed by Lockheed Martin Energy Research Corporation for the US DOE under contract no. DE-AC05-96OR22464.

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title = "Enhanced deformation in light Pr nuclei",

abstract = "We observe for the first time rotational bands of enhanced deformation (ED) in 127Pr and 128Pr, and suggest that these bands are built upon π g9/2 ([404]9/2) in 127Pr and on the π g9/2 vh11/2 orbitals in 128Pr. These are the lightest isotopes of Pr for which ED bands have been observed. A contrasting trend in the dynamical moments of inertia (script J sign(2)) versus N is observed at low frequencies for the {"}normal-deformed{"} π h11/2 and {"}enhanced-deformed{"} π g9/2 bands of 127-131Pr both experimentally and in self-consistent Woods-Saxon calculations. The trends in script J sign(2) and β2 are correlated with a decreasing probability for pair scattering into the deformation-driving vh9/2/f7/2 ([541]1/2) orbital.",

author = "Smith, {B. H.} and Riedinger, {L. L.} and Jin, {H. Q.} and W. Reviol and W. Satu{\l}a and A. Galindo-Uribarri and Sarantites, {D. G.} and Wilson, {J. N.} and D. LaFosse and Mullins, {S. M.}",

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doi = "10.1016/S0370-2693(98)01337-9",

language = "English",

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T1 - Enhanced deformation in light Pr nuclei

AU - Smith, B. H.

AU - Riedinger, L. L.

AU - Jin, H. Q.

AU - Reviol, W.

AU - Satuła, W.

AU - Galindo-Uribarri, A.

AU - Sarantites, D. G.

AU - Wilson, J. N.

AU - LaFosse, D.

AU - Mullins, S. M.

PY - 1998/12/10

Y1 - 1998/12/10

N2 - We observe for the first time rotational bands of enhanced deformation (ED) in 127Pr and 128Pr, and suggest that these bands are built upon π g9/2 ([404]9/2) in 127Pr and on the π g9/2 vh11/2 orbitals in 128Pr. These are the lightest isotopes of Pr for which ED bands have been observed. A contrasting trend in the dynamical moments of inertia (script J sign(2)) versus N is observed at low frequencies for the "normal-deformed" π h11/2 and "enhanced-deformed" π g9/2 bands of 127-131Pr both experimentally and in self-consistent Woods-Saxon calculations. The trends in script J sign(2) and β2 are correlated with a decreasing probability for pair scattering into the deformation-driving vh9/2/f7/2 ([541]1/2) orbital.

AB - We observe for the first time rotational bands of enhanced deformation (ED) in 127Pr and 128Pr, and suggest that these bands are built upon π g9/2 ([404]9/2) in 127Pr and on the π g9/2 vh11/2 orbitals in 128Pr. These are the lightest isotopes of Pr for which ED bands have been observed. A contrasting trend in the dynamical moments of inertia (script J sign(2)) versus N is observed at low frequencies for the "normal-deformed" π h11/2 and "enhanced-deformed" π g9/2 bands of 127-131Pr both experimentally and in self-consistent Woods-Saxon calculations. The trends in script J sign(2) and β2 are correlated with a decreasing probability for pair scattering into the deformation-driving vh9/2/f7/2 ([541]1/2) orbital.

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U2 - 10.1016/S0370-2693(98)01337-9

DO - 10.1016/S0370-2693(98)01337-9

M3 - Article

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SN - 0370-2693

VL - 443

SP - 89

EP - 96

JO - Physics Letters B

JF - Physics Letters B

IS - 1-4

ER -

Enhanced deformation in light Pr nuclei

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