Measurements of conversion coefficients for transitions in 154Gd, 160Dy, 170Yb, 171Yb and 141Pr

Dingus, Ronald S.; Talbert, W.L.; Stewart, M.G.

doi:10.1016/0029-5582(66)90111-8

Cited by 37 publications

(12 citation statements)

References 31 publications

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“…4 " 6 In the proton analog resonance elastic and inelastic scattering on a target C, it is possible to obtain nuclearstructure information which is related to neutron stripping to the parent analog from the same target C, not only in its ground state, but also in its excited states. 4 More recently, decay protons from IAS in Nb 91 * formed in both the (p,n) charge-exchange reaction 7 and the (d,n) reaction 8 have been observed. The (d,np) sequence is particularly useful, since isobaric analogs of excited states as well as ground states can be populated in the (d,n) reaction; thus the study of the subse-quent proton decay from these IAS can yield branching ratios similar to those obtained in the proton resonance scattering.…”

Section: Introductionmentioning

confidence: 99%

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Proton Decay of Analog States Formed in the (d,n) Reaction

Cue

Richard

1968

Phys. Rev.

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Cross sections were measured for proton decay from isobaric analog states (IAS; r=7Vf-l) formed in the (d,n) reactions on the following targets: O 16 , AF, Ni 64 , Zn 68 , Y 89 , Zr 90 -91 -92 ' 94 , Mo 92,94 -98 , Sn 114 ' 116 ' 118 -120 , and Pb 206 . A AE-E detector telescope having a combined energy resolution of about 34 keV was used. Excitation functions (0iab= 170°) were obtained with the deuteron energies ranging from the (d,n) threshold of the IAS to about 16 MeV. Angular distributions were also obtained at the various incident energies for a few of the strong transitions. The cross sections are large only for reactions leading back to the target ground state when, in addition, the neutron decay channels are closed to the IAS. Particular attention is paid to the large variations in the cross sections for reactions proceeding through the analogs of 2d 5 /2, Ssi/2, and 2dz/2 states in Zr, Mo, and Sn isotopes. At incident energies several hundred keV above the (d,n) threshold, these variations are shown to be consistent with a sequential process in which the (d,n) formation mechanism is direct, when the decay through the spreading width is explicitly taken into account in the branching ratios. However, the over-all energy dependence of the (d,n) cross sections, particularly near threshold, deviate sharply from that predicted by a simple direct process in the stripping model. From the study of the angular distributions of the decay to the 0 + ground state from the d 5 /2 (g.s.) IAS in Nb 91 * and Tc 98 *, the w-substate populations of the IAS are extracted. The values at energies near threshold suggest the importance of spinorbit interactions in the (d,n) formation mechanism. Phys. Rev. Letters 17, 926 (1966).

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Section: Introductionmentioning

confidence: 99%

“…In contrast to the E2 transitions in the rare-earth nuclei, the E2 transitions that occur in even-even 7 nuclei in the heavy-element deformed region, A > 220, , have not been extensively studied. These transitions are characterized by low transition energies, normally ;.…”

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confidence: 99%

Proton Decay of Analog States Formed in the (d,n) Reaction

Cue

Richard

1968

Phys. Rev.

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“…In the case of 141Pr Dingus et al [10] concluded that nuclear penetration effects appear to be small. Pancholi [11] has compared his experimental K-shell ICC (c~K=0.376_+0.007) with the theoretical value taken from tables of Sliv and Band [30].…”

Section: Discussionmentioning

confidence: 98%

“…The discrepancies between experimental and theoretical ICC have been discussed under the aspect of nuclear penetration by several authors [5,7,15,16]. Only little and vague information is available for ~4~Pr [10,11]. Again a small E2 contribution has been deduced from L-subshell ratios [12].…”

Section: Introductionmentioning

confidence: 99%

Nuclear structure effect on internal conversion ofl-forbidden transitions in139La,141Pr and203Tl

Hansen

1979

Z Physik A

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“…Several measurements [25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42][43][44] of K conversion coefficients have unfortunately large (5-12%) errors, thus arriving at meaningful conclusions unlikely at the present time. However, a summary of the comparison between the present calculations and the experimental data is given in Table VII.…”

Section: Discussionmentioning

confidence: 99%

Internal Conversion Coefficients with Relativistic Hartree-Fock Model for the Deformed Region

Bhalla

1967

Phys. Rev.

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Measurements of conversion coefficients for transitions in 154Gd, 160Dy, 170Yb, 171Yb and 141Pr

Cited by 37 publications

References 31 publications

Proton Decay of Analog States Formed in the (d,n) Reaction

Proton Decay of Analog States Formed in the (d,n) Reaction

Nuclear structure effect on internal conversion ofl-forbidden transitions in139La,141Pr and203Tl

Internal Conversion Coefficients with Relativistic Hartree-Fock Model for the Deformed Region

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