Alpha-Gamma Angular Correlations in the <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mmultiscripts><mrow><mi mathvariant="normal">Ca</mi></mrow><mprescripts></mprescripts><mrow></mrow><mrow><mn>40</mn></mrow><mrow></mrow><mrow></mrow></mmultiscripts></mrow><mo>(</mo><mrow><mmultiscripts><mrow><mi mathvariant="normal">He</mi></mrow><mprescripts></mprescripts><mrow></mrow><mrow><mn>3</mn></mrow><mrow></mrow><mrow></mrow></mmultiscripts></mrow><mo>,</mo><mi> </mi><mi>α</mi><mi>γ</mi><mo>)</mo><mrow><mmultiscripts><mrow><mi mathvariant="normal">Ca</mi></mrow><mprescripts></mprescripts><mrow></mrow><mrow><mn>39</mn></mrow><mrow></mrow><mrow></mrow></mmultiscripts></mrow></math></span> a Reaction

D. P. Balamuth; R. W. Zurmühle; G. P. Anastassiou; C. R. Gould; C. M. Fou

doi:10.1103/PhysRevC.1.470

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Alpha-Gamma Angular Correlations in the ${}^{40}{Ca} ({}^{3}{He}, α γ) {}^{39}{Ca}$ a Reaction

D. P. Balamuth, R. W. Zurmühle, G. P. Anastassiou, C. R. Gould^*, and C. M. Fou^†

Department of Physics, University of Pennsylvania, Philadelphia, Pennsylvania 19104

^*Present address: Nuclear Structure Laboratory, Duke University, Durham, N.C.
^†Present address: Physics Department, University of Delaware, Newark, Del.

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Phys. Rev. C 1, 470 – Published 1 February, 1970

DOI: https://doi.org/10.1103/PhysRevC.1.470

Abstract

Angular correlations of $γ$ rays leading to states in ${}^{39}{Ca}$ at 2.47, 2.80, 3.03, 3.66, 3.95, and 4.02 MeV have been measured. The spins and parties of the first three excited states were found to be $½^{+}$ , ${\frac{7}{2}}^{-}$ , and ${\frac{3}{2}}^{-}$ , in agreement with previous work. The mixing ratio determined for the 2.80→g.s. transition implies 98% $M 2$ , in disagreement with an earlier measurement. In conjunction with $l$ -value assignments from distorted-wave Born-approximation analysis of charged-particle angular distributions, the present work assigns $J^{π} = {\frac{9}{2}}^{-}$ for the 3.66-MeV state, ${\frac{3}{2}}^{-}$ for the 3.95-MeV state, and $½^{+}$ for the 4.02-MeV state. Multipole mixing and branching ratios were extracted from the data.

References (28)

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[c1] R. Anderson, A. G. Robertson, D. F. H. Start, L. E. Carlson, and M. A. Grace, Nucl. Phys. A131, 113 (1969)

[c2] T. A. Belote, A. Sperduto, and W. W. Buechner, Phys. Rev. 139, B80 (1965)

[c3] C. Glashausser, M. Kondo, M. E. Rickey, and E. Rost, Phys. Letters 14, 113 (1965)

[c4] R. Bock, H. H. Duhm, and R. Stock, Phys. Letters 18, 61 (1965)

[c5] S. Hinds and R. Middleton, Nucl. Phys. 84, 651 (1966)

[c6] W. J. Gerace and A. M. Green, Nucl. Phys. A93, 110 (1967)

[c7] W. J. Gerace and A. M. Green, Nucl. Phys. A113, 641 (1968)

[c8] W. J. Gerace and A. M. Green, Nucl. Phys. A123, 241 (1969)

[c9] A. de-Shalit, Phys. Rev. 122, 1530 (1961)

[c10] C. D. Kavaloski, G. Bassani, and N. M. Hintz, Phys. Rev. 132, 813 (1963)

[c11] P. E. Cavanagh, C. F. Coleman, G. A. Gard, B. W. Ridley, and J. F. Turner, Nucl. Phys. 50, 49 (1964)

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[c13] R. L. Kozub, Phys. Rev. 172, 1078 (1968)

[c14] D. Cline, W. P. Alfrod, and L. M. Blau, Nucl. Phys. 73, 33 (1965)

[c15] G. Ronsin, M. Vergnes, G. Rotbard, and J. Kalifa, Nucl. Phys. A123, 337 (1969)

[c16] J. C. Hiebert, E. Newman, and R. H. Bassel, Phys. Rev. 154, 898 (1967)

[c17] M. B. Lewis, N. R. Roberson, and D. R. Tilley, Phys. Rev. 168, 1205 (1968)

[c18] A. E. Litherland and A. J. Ferguson, Can. J. Phys. 39, 788 (1961)

[c19] R. W. Zurmühle, P. F. Hinrichsen, C. M. Fou, C. R. Gould, and G. P. Anastassiou, Nucl. Instr. Methods 71, 311 (1969)

[c20] A. R. Poletti and E. K. Warburton, Phys. Rev. 137, B595 (1965)

[c21] H. J. Rose and D. M. Brink, Rev. Mod. Phys. 39, 306 (1967)

[c22] D. J. Church (private communication)

[c23] P. B. Smith, Can. J. Phys. 42, 1101 (1964)

[c24] L. Jarczyk, H. Knoepfel, J. Lang, R. Müller, and W. Wölfli, Nucl. Instr. Methods 17, 310 (1962)

[c25] E. W. Hamburger and L. H. Reber, Phys. Rev. 128, 333 (1962)

[c26] D. B. Nichols and M. T. McEllistrem, Phys. Rev. 166, 1074 (1968)

[c27] J. S. Lopes, B. C. Robertson, R. D. Gill, R. A. I. Bell, and H. J. Rose, Nucl. Phys. A109, 241 (1968)

[c28] D. Kurath and R. D. Lawson, Phys. Rev. 161, 915 (1967)

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Alpha-Gamma Angular Correlations in the ${}^{40}{Ca} ({}^{3}{He}, α γ) {}^{39}{Ca}$ a Reaction

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Alpha-Gamma Angular Correlations in the Ca40(He3, αγ)Ca39 a Reaction

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Alpha-Gamma Angular Correlations in the ${}^{40}{Ca} ({}^{3}{He}, α γ) {}^{39}{Ca}$ a Reaction