Nuclear Data Sheets for A = 176

Basunia, M. S.

doi:10.1016/j.nds.2006.03.001

Cited by 148 publications

(90 citation statements)

References 255 publications

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“…4(c), increases the uncertainty dramatically. The result agrees well with the value from Coulomb excitation measurements given in the nuclear data sheets [42].…”

Section: Experimental Procedures and Data Analysissupporting

confidence: 90%

Evolution ofE2transition strength in deformed hafnium isotopes from new measurements onHf172,
Rüdigier
¹
,
Nomura
²
,
Dannhoff
³

et al. 2015
Phys. Rev. C

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Background:The available data for E2 transition strengths in the region between neutron-deficient hafnium and platinum isotopes are far from complete. More and precise data are needed to enhance the picture of structure evolution in this region and to test state-of-the-art nuclear models. In a simple model, the maximum collectivity is expected at the middle of the major shell. However, for actual nuclei, particularly in heavy-mass regions, which should be highly complex, this picture may no longer be the case, and one should use a more realistic nuclear-structure model. We address this point by studying the spectroscopy of Hf as a representative case. Purpose: We remeasure the 2 + 1 half-lives of 172,174,176 Hf, for which there is some disagreement in the literature. The main goal is to measure, for the first time, the half-lives of higher-lying states of the rotational band. The new results are compared to a theoretical calculation for absolute transition strengths. Method: The half-lives were measured using γ -γ and conversion-electron-γ delayed coincidences with the fast timing method. For the determination of half-lives in the picosecond region, the generalized centroid difference method was applied. For the theoretical calculation of the spectroscopic properties, the interacting boson model is employed, whose Hamiltonian is determined based on microscopic energy-density functional calculations.

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“…4(c), increases the uncertainty dramatically. The result agrees well with the value from Coulomb excitation measurements given in the nuclear data sheets [42].…”

Section: Experimental Procedures and Data Analysissupporting

confidence: 90%

Evolution ofE2transition strength in deformed hafnium isotopes from new measurements onHf172,
Rüdigier
¹
,
Nomura
²
,
Dannhoff
³

et al. 2015
Phys. Rev. C

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“…Information was taken from the appropriate Nuclear Data Sheets covering the above Pt mass region for A = 172 [47], A = 174 [48], A = 176 [49], A = 178 [50], A = 180 [51], A = 182 [52], A = 184 [53], A = 186 [54], A = 188 [55], A = 190 [56], A = 192 [57] and, A = 194 [58]. Moreover, we also incorporate data on those even-even Pt nuclei that have been published (see below) since the latest updates of the corresponding Nuclear Data Sheets.…”

Section: The Experimental Data In the Even-even Pt Nucleimentioning

confidence: 99%

“…Here, we include the relative B(E2) values and for these data we have used a relative error of a 20%. The experimental data that we have used are taken from the Nuclear Data Sheets (NDS), Adopted Values references [47,48,49,50,51,52,53,54,55,56,57,58], unless the latest issue was published more than 10 years ago. Therefore, for the mass number A = 182, 184 and 192, the experimental data were taken from [66,79,71], respectively.…”

Section: The Fitting Procedure: Energy Spectra and Absolute B(e2) Redmentioning

confidence: 99%

The Pt isotopes: Comparing the Interacting Boson Model with configuration mixing and the extended consistent-Q formalism

García-Ramos

Heyde²

2009

Nuclear Physics A

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The role of intruder configurations in the description of energy spectra and B(E2) values in the Pt region is analyzed. In particular, we study the differences between Interacting Boson Model calculations with or without the inclusion of intruder states in the even Pt nuclei 172−194 Pt. As a result, it shows that for the description of a subset of the existing experimental data, i.e., energy spectra and absolute B(E2) values up to an excitation energy of about 1.5 MeV, both approaches seem to be equally valid. We explain these similarities between both model spaces through an appropriate mapping. We point out the need for a more extensive comparison, encompassing a data set as broad (and complete) as possible to confront with both theoretical approaches in order to test the detailed structure of the nuclear wave functions. 21.60.Fw. PACS

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“…In addition, neutron transfer in the 175 Lu(d,p) 176 Lu reaction has been used in combination with a high-resolution Q3D magnetic spectrograph [19], and the 176 Yb(p,n) 176 Lu reaction has been combined with high-resolution spectroscopy of HPGe detectors [22]. The obtained information is compiled in the ENSDF online data base [27] which is based on [28]. Further information on IS can be deduced from a Coulomb excitation and activation experiment [13] which has detected the activity of the isomer in 176 Lu recoil nuclei after Coulomb excitation by a 32 S projectile, and from various photoactivation experiments using bremsstrahlung and radioactive sources [8,9,10,11,15,16,17].…”

Section: Available Experimental Data and Interpretationmentioning

confidence: 99%

Properties of the5−state at 839 keV inLu176and the
Mohr¹,
Bisterzo
²
,
Gallino
³

et al. 2009
Phys. Rev. C
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The s-process branching at mass number A = 176 depends on the coupling between the high-K ground state and a low-lying low-K isomer in 176 Lu. This coupling is based on electromagnetic transitions via intermediate states at higher energies. The properties of the lowest experimentally confirmed intermediate state at 839 keV are reviewed, and the transition rate between low-K and high-K states under stellar conditions is calculated on the basis of new experimental data for the 839 keV state. Properties of further candidates for intermediate states are briefly analyzed. It is found that the coupling between the high-K ground state and the low-K isomer in 176 Lu is at least one order of magnitude stronger than previously assumed leading to crucial consequences for the interpretation of the 176 Lu/ 176 Hf pair as an s-process thermometer.

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Nuclear Data Sheets for A = 176

Cited by 148 publications

References 255 publications

Evolution ofE2transition strength in deformed hafnium isotopes from new measurements onHf172,
Rüdigier
¹
,
Nomura
²
,
Dannhoff
³

et al. 2015
Phys. Rev. C

Evolution ofE2transition strength in deformed hafnium isotopes from new measurements onHf172,
Rüdigier
¹
,
Nomura
²
,
Dannhoff
³

et al. 2015
Phys. Rev. C

The Pt isotopes: Comparing the Interacting Boson Model with configuration mixing and the extended consistent-Q formalism

Properties of the5−state at 839 keV inLu176and the
Mohr¹,
Bisterzo
²
,
Gallino
³

et al. 2009
Phys. Rev. C
25
2
30
0
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Nuclear Data Sheets for A = 176

Cited by 148 publications

References 255 publications

Evolution ofE2transition strength in deformed hafnium isotopes from new measurements onHf172,Rüdigier1, Nomura2, Dannhoff3 et al. 2015Phys. Rev. C

Evolution ofE2transition strength in deformed hafnium isotopes from new measurements onHf172,Rüdigier1, Nomura2, Dannhoff3 et al. 2015Phys. Rev. C

The Pt isotopes: Comparing the Interacting Boson Model with configuration mixing and the extended consistent-Q formalism

Properties of the5−state at 839 keV inLu176and theMohr1, Bisterzo2, Gallino3 et al. 2009Phys. Rev. C252300View full textAdd to dashboardCite

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Evolution ofE2transition strength in deformed hafnium isotopes from new measurements onHf172,
Rüdigier
¹
,
Nomura
²
,
Dannhoff
³

et al. 2015
Phys. Rev. C

Evolution ofE2transition strength in deformed hafnium isotopes from new measurements onHf172,
Rüdigier
¹
,
Nomura
²
,
Dannhoff
³

et al. 2015
Phys. Rev. C

Properties of the5−state at 839 keV inLu176and the
Mohr¹,
Bisterzo
²
,
Gallino
³

et al. 2009
Phys. Rev. C
25
2
30
0
View full text Add to dashboard Cite