Half-life of the 6.21 keV level in181Ta

Mouchel, D.; Larsen, A. Nylandsted; Hansen, H. H.

doi:10.1007/bf01412618

Cited by 12 publications

(6 citation statements)

References 4 publications

(18 reference statements)

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“…The long lifetime of this nuclear level (ro = 8.73 p, s [7]) and the complementary narrow energy width (I o = 7.5 X 10 " eV, corresponding to a Doppler shift of 3.6 p, m/s velocity), together with a very large nuclear magnetic moment (p, = +5.2), make this resonance a very sensitive probe of hyperfine interactions. In the field of MOssbauer spectroscopy this resonance gives more than an order of magnitude better energy resolution than the 14.4 keV resonance of Fe (ro = 141 ns).…”

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confidence: 99%

Nuclear Scattering of Synchrotron Radiation by181Ta

et al. 1995

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We report the first observation of excitation of the 6.2 keV nuclear level of ' 'Ta by synchrotron radiation. The absolute energy of the level was determined to be 6214~2 eV. The time distribution of nuclear forward scattering of synchrotron radiation by a 7.5 p, m Ta metal foil was measured, and a decay time of 530~80 ns was observed. Analysis of the time distribution reveals an inhomogeneous broadening of the nuclear resonance in this sample 6~2 natural linewidths.PACS numbers: 76.80.+y, 27.70.+q, 78.70.Ck The recent rapid development of hyperfine nuclear resonance spectroscopy using synchrotron radiation [1] indicates that this method will become a standard technique in the near future. The broadband, pulsed, well-collimated, and highly polarized synchrotron radiation is very differ-

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confidence: 99%

Nuclear Scattering of Synchrotron Radiation by181Ta

et al. 1995

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“…The present investigation of the nuclear levels at 482.2 keV and 615.3keV in lSZTa is a continuation of the work performed on the half life of the 6.2 keV level in the same nuclide [1]. Up to 1973 numerous authors have measured the half life of the 482.2 keV [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22] and that of the 615.3keV [5,8,[23][24][25][26][27][28][29][30][31][32][33][34][35][36] level in ~81Ta.…”

Section: Introductionmentioning

confidence: 73%

“…At CBNM the half lives of several excited nuclear levels have been measured, mainly in nuclei applicable to M6ssbauer spectroscopy [1][2][3]. The present investigation of the nuclear levels at 482.2 keV and 615.3keV in lSZTa is a continuation of the work performed on the half life of the 6.2 keV level in the same nuclide [1].…”

Section: Introductionmentioning

confidence: 83%

Half lives of the 482.2 keV and 615.3 keV levels in181Ta

Mouchel

Hansen

1984

Z Physik A

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The half lives of the excited levels at 482.2keV and 615.3keV in 181Ta have been measured by the delayed coincidence technique. In the nanosecond time range (482.2 keV level) the most serious sources of errors are jitter, walk and drift phenomena. To minimize those the time pick-off has been defined carefully by means of modern fast timing detectors and electronics. In the microsecond time range (615.3 keV level) the ratio of true delayed coincidences to chance coincidences influences considerably the final accuracy of the half-life measurements. It has been reduced as much as possible.From a series of independent measurements half lives of T1/2=(10.67 _+0.05)ns and T1/2 =(17.64_+0.14)ps have been deduced for the 482.2keV and 615.3keV levels, respectively. The results have been compared with other values published before.

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“…The π 9/2 − [514] states in 179 Ta, 181 Ta, and 183 Ta have lifetimes and excitation energies of 2.05 µs at 31 keV, 8.73 µs at 6 keV, and 107 ns at 73 keV, respectively [16][17][18]. Because the 9/2 − [514] state energy is considerably higher in 185 Ta, a shorter lifetime is expected.…”

Section: B Lifetimesmentioning

confidence: 99%

Decay of aKπ=21/2−, 17-ms isomer inTa
Lane
¹
,
Dracoulis
²
,
Byrne
³

et al. 2009
Phys. Rev. C
12
0
4
0
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High-spin states in the neutron-rich nucleus 185 Ta, populated in the decay of a long-lived, three-quasiparticle state, have been studied using deep-inelastic reactions with 136 Xe ions and a 186 W target. The lifetime of the isomer has been measured as 17(2) ms and the spin and parity determined to be K π = 21/2 − , leading to a π 7/2 + [404]ν3/2 − [512]11/2 + [615] configuration assignment. The isomer decays into the rotational band built upon the π 9/2 − [514] intrinsic state via K-forbidden transitions with reduced hindrances of 52 and 71. The π 9/2 − [514] state is itself an isomer with a lifetime of 17(3) ns. It decays via K-allowed E1 transitions to states in the π 7/2 + [404] band with strengths that are similar to equivalent transitions in the lighter tantalum isotopes.

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Half-life of the 6.21 keV level in181Ta

Cited by 12 publications

References 4 publications

Nuclear Scattering of Synchrotron Radiation by181Ta

Nuclear Scattering of Synchrotron Radiation by181Ta

Half lives of the 482.2 keV and 615.3 keV levels in181Ta

Decay of aKπ=21/2−, 17-ms isomer inTa
Lane
¹
,
Dracoulis
²
,
Byrne
³

et al. 2009
Phys. Rev. C
12
0
4
0
View full text Add to dashboard Cite

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Half-life of the 6.21 keV level in181Ta

Cited by 12 publications

References 4 publications

Nuclear Scattering of Synchrotron Radiation by181Ta

Nuclear Scattering of Synchrotron Radiation by181Ta

Half lives of the 482.2 keV and 615.3 keV levels in181Ta

Decay of aKπ=21/2−, 17-ms isomer inTaLane1, Dracoulis2, Byrne3 et al. 2009Phys. Rev. C12040View full textAdd to dashboardCite

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Decay of aKπ=21/2−, 17-ms isomer inTa
Lane
¹
,
Dracoulis
²
,
Byrne
³

et al. 2009
Phys. Rev. C
12
0
4
0
View full text Add to dashboard Cite