Structure of high-spin states in 143Pm

Prade, H.; Käubler, L.; Hagemann, Ulrich; Jäger, H.U.; Kirchbach, Mariana; Schneider, L.; Stary, F.; Roller, Z.; Paar, V.

doi:10.1016/0375-9474(80)90015-9

Cited by 38 publications

(16 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The value ~R = 28(10) ns (an average obtained for the 1317.3 and 1404.8 keV transitions) for Ce in BaO is within the experimental errors nearly temperature independent and is similar [-4] to VR = 28 ns for Pm in Pr6Olt and Ze=27 ns for Ce in BaCO3 [2]. The relaxation time VR = 15(4) ns (mean value for the 1317.3, 1384.7 and 1404.8 keV transitions) for Ce in Ba metal agrees with ZR = 15 ns for Pm in Pr metal [4] and has the same order of magnitude as zR = 7 ns for Pr in La metal [3]. In order to explain the strong attenuation and the different relaxation times for the considered hosts further experimental investigations are necessary.…”

Section: Experimental Procedures and Resultssupporting

confidence: 59%

“…The gfactor of the isomeric I0~-state was determined by means of the time differential observation of the perturbed angular distribution (TDPAD). Details of the experimental arrangements have been described in [4,18,19].…”

Section: Experimental Procedures and Resultsmentioning

confidence: 99%

“…In t4~ a ns-isomer with J~= 10 + and a half-life T~/z=23.1 (4) ns was found [13,14] at E x =3714.7 keV. This state is the highest-lying known ns-isomer for N = 82 nuclei with Z < 64 having a rather large angular momentum.…”

Section: Introductionmentioning

confidence: 91%

“…In the course of recent in-beam investigations [1][2][3][4] of the semimagic N=82 nuclei a3SBa, 140Ce, 141pr and ~43pm the level schemes have been extended up to excitation energies E x < 5 MeV and for spin values up to about 14h. The experimental spectroscopic data, including also electromagnetic properties were compared with shell model calculations.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

The magnetic moment of the 10+ isomer in140Ce andE1 transitions inN=82 isotones caused by outer subshell configurations

Käubler

Enghardt

Prade

et al. 1988

Z. Physik A - Atomic Nuclei

Self Cite

View full text Add to dashboard Cite

Using the reaction 13SBa(c~,2n)14~ the magnetic moment of the 10~ isomer at Ex = 3714.7 keV in the N = 82 nucleus 14~ has been determined by means of the TDPAD method to # = + 10.3(4)#N-Measured g-factors in ~4~ are compared to calculations within the shell model with configuration mixing. For the 10( isomer in 14~ the four proton configuration ~(lg2/2,2d2/2 ) has been found to be dominant. From the g-factor measurement strong contributions of multiparticle excitations to the 7r2d3/2, 7r3sl/2 or rclh~l/2 shells and admixtures of neutron excitations to the wave function of the 10~ state could be excluded. The strong E1 y-branch of the deexcitation of the 10( isomer in ~4~ can be explained by means of small admixtures of configurations which contain the outer subshell excitations 7r2fw 2 and n 1 h9/2. On this basis E 1 transitions experimentally observed in the N =82 nuclei ~4~ ~41Pr and ~45Eu may be understood.

show abstract

Section: Experimental Procedures and Resultssupporting

confidence: 59%

Section: Experimental Procedures and Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The magnetic moment of the 10+ isomer in140Ce andE1 transitions inN=82 isotones caused by outer subshell configurations

Käubler

Enghardt

Prade

et al. 1988

Z. Physik A - Atomic Nuclei

Self Cite

View full text Add to dashboard Cite

show abstract

“…In this model the negative-parity states of 144e~ 62~Ltx82 are assumed to arise from coupling a 1 ha 1/2 proton to low-lying shell-model states of the 143' D--61J_III82 core (for an extensive shellmodel study of 143pm, see Ref. [3]). The hamiltonian used here reads H = H .... + Hs,p.…”

Section: Discussionmentioning

confidence: 99%

Lifetime measurements and particle-core coupling calculations in144Sm

Kostov

Andrejtscheff

Kostova

et al. 1986

Z. Physik A - Atomic Nuclei

Self Cite

View full text Add to dashboard Cite

Applying the generalized centroid shift method in the 142Nd(0~, 2n)144Sm reaction the following half-lives have been measured: T1/2 (3,376 keV) = (1.6 • 0.2) ns, T1/2 (3,460 keV) = (0.5 __ 0.2) ns and T,/2 (5,150 keV)< 0.3 ns. Level energies and electromagnetic transition rates have been calculated within a particle-core coupling approach that is based on the shell model with configuration mixing. The persistence of l-forbiddenness of M 1 transitions between rather complex configurations could be confirmed.Nuclear Reactions: 142Nd(~,2n) E=27 MeV; measured E~, Is, 7(0. T1/2, B(2).Enriched target, Ge(Li) detector.

show abstract

Microscopic Structure of Semimagic Nuclei with 82 Neutrons or 50 Protons

et al. 1986

Self Cite

View full text Add to dashboard Cite

A b s t r a c t . Excited states of the semimagic nuclei 13*Ba, 140Ce, 141Pr, l43Pm, 144Sm, 109Sn and "'Sn have been investigated by means of in-beam y-spectroscopic methods. Levels in the vicinlty of the yrast line having energies up to about 5 MeV have been identified and spin and parity could be determined for most of them. Several nanosecond and subnanosecond isomers have bem found in the level schemes of the nuclei investigated. The g-factors of three nanosecond isomers have been measured. The large amount of experimental information has been compared with the results of a comprehensive analysis of the excited states of N = 82 and 2 = 50 semimagic nuclei in the framework of the shell model with configuration mixing. This reveals that the majority of the observed excited states of N = 82 isotones or 2 = 60 isotopes can be understood as few-particle excitations outside the doubly magic cores 13%n and looSn, respectively. Die mikroskopische Struktur halbmagischer Kerne mit 82 Neutronen odor 50 ProtonenI n h a l t s u b e r s i c h t . Angeregte Zustande der halbmagischen Kerne lSsBa, l4OCe, 141Pr, l43Pm, 14*Sm, 109Sn und "'Sn wurden mit Hilfe der Methoden der y-Spektroskopie a m Strahl geladener Teilchen untersucht. Es wurden Niveaus, die in der Nahe der Yrast-Linie liegen und eine Energie bis etwa 5 MeV haben, identifiziert, wobei fur einen GroBteil von ihnen Drehimpuls und Paritat bestimmt werden konnten. Mehrere isomere Zustande mit Lebensdauern im Nsnosekunden-bzw. Subnanosekundengebiet wurden in den Niveauschemata der untersuchten Kerne gefunden. Fur drei isomere Niveaus wurden die magnetischen Momente gemessen. Die Vielzahl experimenteller Ddten wurde mit den Ergebnissen einer umfassenden theoretischen Analyse verglichen, die auf der Basis des Schalenmodells mit Bonfigurationsmischung ausgefuhrt wurde. Dabei zeigt sich, daB die meisten der beobachteten angeregten Bernzustande in N = 82 Isotonen bzw. 2 = 60 Isotopen aus dcr Anregung weniger Valenznukleonen, die sich auBerhalb der doppeltmngischen Rumpfe 132Sn bzw. 1ooSn befinden, verstanden werden konnen.

show abstract

Structure of high-spin states in 143Pm

Cited by 38 publications

References 36 publications

The magnetic moment of the 10+ isomer in140Ce andE1 transitions inN=82 isotones caused by outer subshell configurations

The magnetic moment of the 10+ isomer in140Ce andE1 transitions inN=82 isotones caused by outer subshell configurations

Lifetime measurements and particle-core coupling calculations in144Sm

Microscopic Structure of Semimagic Nuclei with 82 Neutrons or 50 Protons

Contact Info

Product

Resources

About