Properties of 96, 98Rh from the 96, 98Ru(p, n) reaction

Ashkenazi, J.; Friedman, E.; Nir, D.; Zioni, J.

doi:10.1016/0375-9474(70)90058-8

Cited by 18 publications

(6 citation statements)

References 10 publications

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“…Efficiency values at the higher energies up to ∼3 MeV were deduced from the intensity balance along the transition sequences observed in the coincidence spectra with gate on the higher-lying transitions following de-excitations in the 38 Ar [38], 39 K [39], 93 Tc [40], and 96 Ru [9] nuclei. The 38 Ar and 39 K were produced as fission products in the reaction of 28 Si ion beam with the light nuclei present in the target, viz., the 27 Al frame of the target and 16 O in the oxide form. The 93 Tc and 96 Ru were produced in the 4-particle emission channels of the present fusion-evaporation reaction.…”

Section: Methodsmentioning

confidence: 99%

“…Low-spin excited states in 98 Rh have been previously investigated from the β + and EC decay of 98 Pd (T 1/2 = 17.7 min) [26,27], and the in-beam light-ion-induced 98 Ru(p,nγ ) [28], 99 Ru(d,3n), and 96 Ru(α,np) [29] reactions. Concurrent γ -ray spectroscopic studies by Ghugre et al [30] and Chattopadhyay et al [31] using the heavy-ion-induced 65 Cu( 36 S,3n) and 70 Ge( 32 S,3pn) reactions have resulted in level scheme of 98 Rh up to high spins ∼20 .…”

Section: Introductionmentioning

confidence: 99%

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Band structures in doubly oddRh98

et al. 2014

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Excited states in the transitional doubly odd 98 Rh nucleus were populated in the 75 As( 28 Si,2p3n) fusionevaporation reaction using the 120-MeV incident 28 Si beam. The subsequent de-excitations were investigated through in-beam γ -ray spectroscopic techniques using an early implementation phase of the Indian National Gamma Array (INGA) spectrometer equipped with 18 clover Ge detectors. The level structures in 98 Rh have been established up to excitation energy ≈10 MeV and angular momentum ∼23 . The previously reported level schemes are considerably modified and extended substantially. Significant expansion of the level scheme at low excitation energies stipulates that the previously reported 842-726-994-980-265 keV γ -transition cascade in 98 Rh is not directly based on the ground state (T 1/2 = 8.7 min). Tilted-axis cranking (TAC) shell-model calculations have been used to put the present level scheme of 98 Rh in perspective. Level structures have been interpreted in terms of the rotational bands based on the πp 1/2 ⊗ νh 11/2 [triaxiality parameter (γ ) = 25 • ], and πf 5/2 ⊗ νh 11/2 proton-neutron configurations having moderate quadrupole deformation ( 2 ≈ 0.13) and the admixtures. Excited band structures are based on the πp 1/2 /f 5/2 ⊗ π (g 9/2 ) 2 ⊗ νh 11/2 configuration and the fully stretched [πp 1/2 ⊗ ν(h 11/2 ) 2 ⊗ νd 5/2 ] 13 − configuration.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Band structures in doubly oddRh98

et al. 2014

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“…However, the ME(96Rh) value of -79,630+_13 keV [24] was calculated assuming that the ground state of 96Rh was populated in the (p, n) reaction. Having improved knowledge on the decay schemes of 96g'mRh [15,16] one can find that the reported thresholds of 7.300 and 7.425 MeV [25] correspond to (p, n) reactions leading to the 52 keV isomeric state and the excited state at 177 keV, respectively. Taking the latter results into account, the mass-excess of 96gRh was recalculated to be -79,682+ 13 keV.…”

Section: %M1/58%e2mentioning

confidence: 96%

“…Based on this result, Wapstra and Audi gave the mass-excess (ME) of -86,071___8 keV for 96Ru [24]. This, together with the determination of the 96Ru(p, n)96Rh reaction threshold of 7,300_+10 keV [25], leads to the mass-excess of 96Rh. However, the ME(96Rh) value of -79,630+_13 keV [24] was calculated assuming that the ground state of 96Rh was populated in the (p, n) reaction.…”

Section: %M1/58%e2mentioning

confidence: 97%

The Gamow-Teller transitions in the96Pd→96Rh decay

et al. 1985

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Using the 4~MeV/u)+6~ reaction and on-line mass separation, the decay 96 properties of 46Pdso were reinvestigated. From a comparison of experimental and theoretical fl § + fl+) probability ratios, the QEc value was deduced to be 3,450_+ 150 keV. The strength was determined for four 0+~ 1 § Gamow-Teller beta transitions and found to be quenched as compared to predictions of the single-particle shell model. For 96pd and 94Ru the sources of this quenching are discussed.

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“…This, in turn, did not allow an unambiguous spin-parity assignment for the ground state of Rh [1,2]. The P end-point energy was also determined in the above study, which, however, differs considerably, as much as 600 keV, from the value of 5057(10) keV obtained earlier from a 9sRu(p, n) reaction study [3]. The atomic mass table of Wapstra and Audi [4] has reported the latter value, which also agrees with the predictions of other mass tables [5].…”

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confidence: 63%

Decay ofRh98

Banerjee

Murthy

et al. 1994

Phys. Rev. C

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The decay of Rh has been studied using p and P spectroscopy techniques. The Ru(n, pn) reaction was used to produce Rh and the activities were transported to a low background counting station using a He-jet system. The P end point energy has been determined from the decay of Rht o Ru. The end-point energy determined in this study differs considerably from an earlier study using similar technique but agrees well with that of an earlier (p, n) reaction study. The present study has also resulted in a modified decay scheme (partial) for the decay of Rh. ]. The authors reported P feedings to a number of states in ssRu from the ground state of ssRh; the P transitions to the 0+) 2+) and 4+ states of the ground state band in Ru were observed with intensities of 10%, 70%, and 5%, respectively. This, in turn, did not allow an unambiguous spin-parity assignment for the ground state of Rh [1,2]. The P end-point energy was also determined in the above study, which, however, differs considerably, as much as 600 keV, from the value of 5057(10) keV obtained earlier from a 9sRu(p, n) reaction study [3]. The atomic mass table of Wapstra and Audi [4] has reported the latter value, which also agrees with the predictions of other mass tables [5].It was hoped, therefore, that a careful study of the decay of Rh~should help remove the above discrepancy in the end-point energy and may also lead to an improved decay scheme for 9 Rh decay. In this Brief Report the experimental determination of the P end-point energy using singles and coincidence P-p spectroscopy is reported. The modifications in the decay scheme that have resulted f'rom the present study are discussed.The nucleus ssRh was produced in the 9 Ru(n, pn) reaction with an a beam &om the Cyclotron at the Variable Energy Cyclotron Centre, Calcutta. The target was natural ruthenium of thickness 10 mg/cm2 deposited on a 25 pm Al foil. The incident beam energy was chosen to be 30.25 MeV, which was decided on the basis of the relative p-ray excitation function measurements of 98Rh with respect to other products, in the incident beam energy range from 25 to 42 MeV (on target). The recoil products were transported to a low background counting station, 10 m away &om the target chamber, using a Hejet recoil transport system [6] and collected on a 10 pm thick Mylar foil.The telescope for P-particle detection consisted of two NE102 plastic scintillator detectors; the AE detector (for p-rejection) was 500 pm thick and 25 mm in diameter, and the E detector was 15 cm thick and 15 cm in diameter. The AE detector was placed very close to the collection foil, and the E detector was suitably placed so that only the P particles which pass through the b, E de-6 10 5 10 4 (n 1oz: c3 10 2 10 1 10 I I I I I I 1150 1350 1550 1750 1950 CHANNEL NUMBER FIG. 1. Relevant portion of a typical singles p-ray spectrum.tector are collected in the E detector. The p-ray detector was a 10% HPGe with an energy resolution of 2.0 keV at 1332 keV. The p-ray detector was placed in a close geometry with respect to the acti...

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Properties of 96, 98Rh from the 96, 98Ru(p, n) reaction

Cited by 18 publications

References 10 publications

Band structures in doubly oddRh98

Band structures in doubly oddRh98

The Gamow-Teller transitions in the96Pd→96Rh decay

Decay ofRh98

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