Energy levels in 98Tc from the 98Mo(p, n)98Tc and 97Mo(3He, d)98Tc reactions

Finlay, R.W.; McKenna, C.M.; Comfort, J. R.; Bainum, D.E.

doi:10.1016/0375-9474(76)90155-x

Cited by 18 publications

(12 citation statements)

References 9 publications

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“…In the calculation of the intensity of the 21.8 keV y-line the contribution of the Ru Kp X-rays has been taken into account, During our measurements the level scheme and the isomeric decay of 98Tc have been investigated by other authors [14][15][16], too. In contrast to Wender et al [16] who consider the observed 21,8 keV y-line to be a M 1 transition to the ground state, we suppose the 91.2 keV level to be an isomeric state which decays by the 21.8keV transition followed by the 43.5keV line and a highly converted transition of about 26 keV …”

Section: 19stc Isomermentioning

confidence: 99%

An investigation of short-lived isomers in the nuclei90,92Nb,99Mo,98,100,101Tc and101Ru

Bartsch¹,

Huber²,

Kneißl³

et al. 1978

Z Physik A

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Short-lived isomers in the nuclei 90, 92Nb ' 99Mo ' 98,1oo, lOlTc and l~ populated in photonuclear reactions were studied by pulsed beam techniques. Energy and half-life of the 7-rays deexciting the isomeric levels were measured by recording energy-time spectra. The delayed y-rays and K X-rays were detected by means of an intrinsic Ge-detector of high resolution. From the measured intensity ratios internal conversion coefficients were determined. The multipolarities of the isomeric transitions could be deduced in most cases. A classification of the observed isomers has been tried on the basis of the obtained experimental results and most recent literature data.

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Section: 19stc Isomermentioning

confidence: 99%

An investigation of short-lived isomers in the nuclei90,92Nb,99Mo,98,100,101Tc and101Ru

Bartsch¹,

Huber²,

Kneißl³

et al. 1978

Z Physik A

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“…This figure also shows that the odd coefficients, which are not affected by pairing, decrease nevertheless systematically. This implies that there is a disCrepancy between the experimental splitting in the isotones, [6,19,[23][24][25][26][27][28]. A few unknown data are assumed to follow the overall trend.…”

Section: Collective Admixtures and The Effective Proton-neutron Forcementioning

confidence: 99%

The empirical form of the effective nucleon-nucleon interaction in a model space with correlatedJ=0 pairs

Akkermans

Allaart

1982

Z Physik A

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Like in earlier work by Schiffer et al, the effective interaction is derived from experimental two-body muttiplets. However, now the assumption is that a muttiplet state is formed by two unpaired fermions relative to a core of correlated J=0 pairs. Then the need for two ranges, as proposed by Schiffer, disappears for the force between identical nucleons in a model space which is large enough to include pairing correlations, A form with a single attractive medium range is preferred for the identical nucleon interaction in order to reproduce collective 2 + states in even-even nuclei. In contrast, the proton-neutron force requires a very short range or two ranges to reproduce the empirical values of multipole coefficients, observed in odd-odd nuclei. Therefore we discuss the fact that the effective interaction is not always isospin invariant. As a typical case broken-pair calculations in the N=50 region are considered. But the conclusions drawn, will also apply to other regions of the periodic table.

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“…According to Hayakawa et al [2] the 7' value is excluded. For the 21.8 keV level 5+, (6') spin-parity values were given by Hayakawa et al, and (6,5)' values by Emigh and Anderson [4] on the basis of angular distribution and cross section measurements. According to Emigh and Anderson the spin of the 65.35 keV level is (3,4).…”

Section: Level Schemementioning

confidence: 99%

“…Hence the probable value is (3). On the basis of the angular distribution of cross section values the spin of the 106.66 keV level is probably 7 [ According to neutron time-of-flight measurements the 190.33 k 0.25 keV level is strongly excited in low energy (p, n) reaction [6], thus the spin of the state is 5 4. The 424.16 keV 4, 5 ' level (see later) decays through an E l + (9 k 3)% M2 transition to the 190.33 keV state.…”

Section: Level Schemementioning

confidence: 99%

“…From (3He, t), (3He, d), (a, t), (p, d), (d, t) and (p, n) reactions the properties of the 9 8 T ~ nucleus were studied by several authors [l-81. y-spectroscopic analysis was performed by Finlay et al [6], Martin et al [7], and Miracle et al [8]. The conversion electron spectrum of the 9 8 T ~ transitions was measured till now only by Miracle and Kern [9].…”

Section: Introductionmentioning

confidence: 99%

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Excited States of⁹⁸Tc from the⁹⁸Mo(p,nγ)⁹⁸Tc Reaction

et al. 1982

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yspectra and integral 7 excitation functions of the 98Mo(p, n ~) ~' T c reaction were measured with Ge(Li) and hyperpure Ge detectors in the 2.4-4.0 MeV energy interval of the bombarding protons. The conversion electron spectrum of the reaction was measured with a superconducting magnet transporter Si(Li) spectrometer. The level scheme of 9 8 T ~, -,branching ratios, multipolarity of transitions, level spin and parity values have been deduced. The energies of '*Tc levels were calculated on the basis of the parabolic rule which was derived from the cluster-vibration model. The experimental level scheme of 9 8 T ~ has been compared with the available theoretical results.

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Energy levels in 98Tc from the 98Mo(p, n)98Tc and 97Mo(3He, d)98Tc reactions

Cited by 18 publications

References 9 publications

An investigation of short-lived isomers in the nuclei90,92Nb,99Mo,98,100,101Tc and101Ru

An investigation of short-lived isomers in the nuclei90,92Nb,99Mo,98,100,101Tc and101Ru

The empirical form of the effective nucleon-nucleon interaction in a model space with correlatedJ=0 pairs

Excited States of⁹⁸Tc from the⁹⁸Mo(p,nγ)⁹⁸Tc Reaction

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Energy levels in 98Tc from the 98Mo(p, n)98Tc and 97Mo(3He, d)98Tc reactions

Cited by 18 publications

References 9 publications

An investigation of short-lived isomers in the nuclei90,92Nb,99Mo,98,100,101Tc and101Ru

An investigation of short-lived isomers in the nuclei90,92Nb,99Mo,98,100,101Tc and101Ru

The empirical form of the effective nucleon-nucleon interaction in a model space with correlatedJ=0 pairs

Excited States of98Tc from the98Mo(p,nγ)98Tc Reaction

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Excited States of⁹⁸Tc from the⁹⁸Mo(p,nγ)⁹⁸Tc Reaction