Rotation aligned bands and configuration dependent interaction in189Hg

Guttormsen, M.; Blume, K.P.; Agarwal, Y.K.; Grumbkow, A.v.; Hardt, K.; Hübel, H.; Recht, J.; Schüler, P.

doi:10.1007/bf01412158

Cited by 18 publications

(9 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A portion of the level scheme of 189 Hg relevant to the present study is displayed in figure 1. This is consistent with previous reports in references [10,13,18,22,41,45]. Measurements were performed using γγγ(t) technique [43,44].…”

Section: Experimental Methods and Resultssupporting

confidence: 91%

“…In the heavier mercury isotopes, a systematic even-odd staggering in experimental B(E2) in both positive-and negative-parity bands, decrease in B(E2, 33/2 + → 29/2 + ) and increase in B(E2, 12 + → 10 + ) is observed as one moves from light to heavy isotopes [3,5,8,11,13,40,41]. The different trends of B(E2) values in the mercury isotopes with 190…”

Section: Introductionmentioning

confidence: 92%

“…The present paper reports experimental results of measurements aimed at determining the lifetimes of the 33/2 + and 25/2 − proposed as isomeric states of 189 Hg [13], using the electronic fast-timing technique [43,44]. The systematics of the B(E2) values is discussed for the mercury isotopes with 189 A 198.…”

Section: Introductionmentioning

confidence: 95%

“…In the last few decades, high spin states in mercury isotopes have been investigated extensively by experiments and in theory [6,[33][34][35][36][37][38][39][40]. In the odd-A mercury isotopes decoupled ΔI = 2 bands built on a 13/2 + state, and a band crossing at I π = 29/2 + due to the alignment of a pair of i 13/2 neutrons were identified [13,16,19,31]. A negative parity band built on the I π = 21/2 − state was also observed.…”

Section: Introductionmentioning

confidence: 99%

“…For the 189 Hg nucleus, a rotation-aligned band built on a 13/2 + state and a negative parity band built on a 21/2 − state were identified via the 175 Lu( 19 F, 5n) [10]. One-and three-quasiparticle rotational bands were studied using the 181 Ta( 14 N, 6n) reaction [13] and interpreted within the cranked shell model. A superdeformed structure has been identified by using the 160 Gd( 34 S, 5n) reaction [18].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Fast-timing lifetime measurements of the 33/2⁺ and 25/2⁻ states in ¹⁸⁹Hg: oblate excitations

Zheng¹,

Li²,

Wu³

et al. 2022

J. Phys. G: Nucl. Part. Phys.

View full text Add to dashboard Cite

The lifetimes of the $I^{\pi}=33/2^{+}$ and $I^{\pi}=25/2^{-}$ states with $E_x=2674.6$ keV and $E_x=1917.3$ keV, respectively, in $^{189}$Hg have been determined by using the fast-timing techniques with the HPGe and LaBr$_{3}$:Ce array via the $^{175}$Lu($^{19}$F,5$n$)$^{189}$Hg reaction at a beam energy of 100 MeV. The deduced $B(E2)$ strengths have been discussed in relation to the systematics of the previously reported $B(E2)$ strengths in the heavy mercury isotopes. The transition quadrupole moments $Q_t$ are derived from present experimental data. The $Q_t$ values together with the excitation energies of the (+,0)(+,1/2) and (+,0)(-,1/2) bands are interpreted in terms of the Nilsson-Strutinsky-Bogoliubov model(CNSB) calculations suggesting oblate excitations in $^{189}$Hg.

show abstract

Section: Experimental Methods and Resultssupporting

confidence: 91%

Section: Introductionmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Fast-timing lifetime measurements of the 33/2⁺ and 25/2⁻ states in ¹⁸⁹Hg: oblate excitations

Zheng¹,

Li²,

Wu³

et al. 2022

J. Phys. G: Nucl. Part. Phys.

View full text Add to dashboard Cite

show abstract

Characterization of the superdeformed band in189Hg

Bearden

Janssens

Carpenter

et al. 1992

Z. Physik A - Hadrons and Nuclei

View full text Add to dashboard Cite

Abstract:Much improved data on the superdeformed band in rSgHg have been obtained in the study of the la~ 5n) reaction at 165 MeV. Energies of ten intraband transitions have now been determined and the decay into the yrast line has been delineated. A discussion of probable spins for the 1891-Ig superdeformed band raises questions about proposed procedures for assigning spins to superdeformed states. PACS: 23.20.Lv, 27.80.w The e:dstence of an "island" of superdeformed (SD) nuclei in the vicinity of A = 190 is now well established [1]. Among the many unanswered questions arising from the available results, those regarding the limits of the SD island in proton and neutron number and those regarding the possibility of assigning spins to the SD states have received considerable attention [1,2]. In an experiment designed for the study of superdeformation in 19~ Drigert et al. [3] found a weak SD band which was assigned to 189Hg on the basis of the available coincidence information. However, this information was rather fragmentary since, at the selected beam energy, the intensities of the measured transitions were very weak. We report here on a subsequent experiment designed to optimize the yield in the lS9Hg SD band. Additional transitions have been observed and the decay towards the yrast line has been delineated.The experiment was performed at the ATLAS superconducting linear accelerator at Argonne National Laboratory with the Argonne-Notre Dame BGO v-ray facility consisting of i2 Compton-suppressed germanium detectors (CSG) surrounding an inner array of 50 BGO ele-* Present address: GSI, W-6100 Darmstadt, Federal Republic of Germany ** Permanent address: Physics Department, Australian National University, Canberra, Australia *** Present address: Physics Department, University of Washington, Seattle, WA98195, USA ments. The 1S~ reaction at 165 MeV was selected to populate the highest spin states in lSgHg. Two stacked thin targets, totaling lmg/cm 2, of enriched (98%) 16~ were used. Only events where at least 4 array elements fired in prompt coincidence with a minimum of 2 CSG's were recorded. In the analysis, transitions between the highest-spin states were relatively enhanced by selecting V -V coincidence matrices with the condition that at least 10 of the array elements had fired. The final coincidence matrix contained approximately 10 s events.All the lines reported in ref. 3 have been observed in the present data as can be seen from fig. 1, where the sum of the spectra in coincidence with the three cleanest transitions is presented. The improved statistics results in a more precise determination of the transition energies in the SD band as well as in its extension by at least one, and more likely two, additional transitions. Furthermore, the SD v-rays are clearly in coincidence with known [4] yrast transitions in lS9Hg, some of which are indicated in fig. 1. Thus, there is no remaining uncertainty concerning the assignment of this band to lSgHg. This nucleus is the lightest Hg isotope for which superdeformati...

show abstract

Spectroscopy of195Hg and196Hg

Mehta

Agarwal

Blume

et al. 1991

Z. Physik A - Hadrons and Nuclei

View full text Add to dashboard Cite

Rotation aligned bands and configuration dependent interaction in189Hg

Cited by 18 publications

References 17 publications

Fast-timing lifetime measurements of the 33/2⁺ and 25/2⁻ states in ¹⁸⁹Hg: oblate excitations

Fast-timing lifetime measurements of the 33/2⁺ and 25/2⁻ states in ¹⁸⁹Hg: oblate excitations

Characterization of the superdeformed band in189Hg

Spectroscopy of195Hg and196Hg

Contact Info

Product

Resources

About

Rotation aligned bands and configuration dependent interaction in189Hg

Cited by 18 publications

References 17 publications

Fast-timing lifetime measurements of the 33/2+ and 25/2− states in 189Hg: oblate excitations

Fast-timing lifetime measurements of the 33/2+ and 25/2− states in 189Hg: oblate excitations

Characterization of the superdeformed band in189Hg

Spectroscopy of195Hg and196Hg

Contact Info

Product

Resources

About

Fast-timing lifetime measurements of the 33/2⁺ and 25/2⁻ states in ¹⁸⁹Hg: oblate excitations

Fast-timing lifetime measurements of the 33/2⁺ and 25/2⁻ states in ¹⁸⁹Hg: oblate excitations