Bombarding energy dependence of <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mmultiscripts><mrow><mi mathvariant="normal">Er</mi></mrow><mprescripts></mprescripts><mrow></mrow><mrow><mn>168</mn></mrow><mrow></mrow><mrow></mrow></mmultiscripts></mrow><mo>(</mo><mi>d</mi><mo>,</mo><mi> </mi><mi>t</mi><mo>)</mo></math></span> transitions

H. S. Song; J. V. Maher

doi:10.1103/PhysRevC.18.714

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Bombarding energy dependence of ${}^{168}{Er} (d, t)$ transitions

H. S. Song^* and J. V. Maher

Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, Pennsylvania 15260

^*Present address: Goddard Space Flight Center, Greenbelt, Maryland 20770.

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Phys. Rev. C 18, 714 – Published 1 August, 1978

DOI: https://doi.org/10.1103/PhysRevC.18.714

Abstract

Angular distributions have been measured for transitions populating residual states in ${}^{167}{Er}$ through the ${}^{168}{Er} (d, t)$ reaction at $E_{d} = 15, 13, 11, and 9$ MeV. Many of these transitions were previously seen to have angular distribution shapes which agreed with distorted-wave Born-approximation predictions at 17 MeV and these transitions also agree well with distorted-wave Born-approximation predictions at the lower bombarding energies. A small but significant number of transitions exhibited anomalously shaped angular distributions at 17 MeV and these continue to have anomalous angular distributions at the lower bombarding energies. Spectroscopic factors do not vary significantly over the bombarding energy range $9 \leq E_{d} \leq 17$ MeV. Spectroscopic factor disagreements between recent analyses of 17 MeV angular distributions and previously reported analyses of individual spectra at 12 MeV presumably do not result from a bombarding energy dependence but rather from the large uncertainties inherent in applying the distorted-wave Born-approximation analysis without having complete angular distributions.

NUCLEAR REACTIONS ${}^{168}{Er} (d, t)$ , $E_{d} = 15, 13, 11, and 9$ MeV measured $σ (θ)$ ; DWBA analysis, deduced levels, $l$ values, spectroscopic factors. Enriched targets.

References (8)

J. V. Maher, G. H. Wedberg, J. J. Kolata, J. C. Peng, and J. L. Ricci, Phys. Rev. C 8, 2390 (1973)
J. C. Peng, J. V. Maher, G. H. Wedberg, and C. M. Cheng, Phys. Rev. C 3, 1451 (1976)
J. V. Maher, H. S. Song, G. H. Wedberg, and J. L. Ricci, Phys. Rev. C 14, 40 (1976)
H. S. Song, J. J. Kolata, and J. V. Maher, Phys. Rev. C 16, 1363 (1977)
[1–4] P. O. Tjom and B. Elbek, K. Dan. Vidensk. Selsk., Mat.-Fys. Medd. 37, No. 7 (1969) R. A. Harlan and R. K. Sheline, Phys. Rev. 168, 1373 (1968)
M. E. Bunker and C. W. Reich, Rev. Mod. Phys. 43, 348 (1971)
J. R. Erskine, Phys. Rev. C 5, 959 (1972)
P. D. Kunz, University of Colorado (unpublished)

[c1] J. V. Maher, G. H. Wedberg, J. J. Kolata, J. C. Peng, and J. L. Ricci, Phys. Rev. C 8, 2390 (1973)

[c2] J. C. Peng, J. V. Maher, G. H. Wedberg, and C. M. Cheng, Phys. Rev. C 3, 1451 (1976)

[c3] J. V. Maher, H. S. Song, G. H. Wedberg, and J. L. Ricci, Phys. Rev. C 14, 40 (1976)

[c4] H. S. Song, J. J. Kolata, and J. V. Maher, Phys. Rev. C 16, 1363 (1977)

[c5] [1–4] P. O. Tjom and B. Elbek, K. Dan. Vidensk. Selsk., Mat.-Fys. Medd. 37, No. 7 (1969) R. A. Harlan and R. K. Sheline, Phys. Rev. 168, 1373 (1968)

[c6] M. E. Bunker and C. W. Reich, Rev. Mod. Phys. 43, 348 (1971)

[c7] J. R. Erskine, Phys. Rev. C 5, 959 (1972)

[c8] P. D. Kunz, University of Colorado (unpublished)

Physical Review C

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Bombarding energy dependence of ${}^{168}{Er} (d, t)$ transitions

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Bombarding energy dependence of Er168(d, t) transitions

Abstract

References (8)

Bombarding energy dependence of ${}^{168}{Er} (d, t)$ transitions