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Allen, J.S. Stotland, Victor G. 2011-07-11T14:17:02Z 2011-07-11T14:17:02Z 10000-01-01 1968 "The reaction 9Be(3He,a)8Be* -+ a + a has been studied at incident beam energies of 27.4 and 27.8 MeV. Two solid-state detectors were mounted in the reaction plane and set at such angles that the peak corresponding to the 9Be(3He,a)8Be(E . = excLt. 11.4 MeV) and the peak due to 8 Be(E .t = 11.4 MeV) -+ 2a, as eXCL. seen in a given detecto~ were superimposed over a wide angular range. The results show that for Ep = 27.8 MeV, 91 = 77°, 92 = 60° and for Ep = 27.4 MeV,91 = 80°, 92 = 59°, there is order-of-emission destructive interference, where a peak due to the superimposition of the two closely spaced peaks is expected. Assuming no interference is present the width of the 11. 4 MeV level of 8 Be""* as deduced from the separation of the two peaks, is less than 2.5 MeV, a value which is considerably smaller than the known width of 4.0 MeV. On the other han4 using coherent addition of two Breit-Wigner line shapes characterized by widths of 4.0 MeV, one can predict a dip between the two peaks that is in qualitative agreement with the experimental data." Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-07-11T14:17:02Z No. of bitstreams: 1 1968_stotland.pdf: 3649453 bytes, checksum: f0351f6e1ee5c1db2e658965e56c4672 (MD5) Made available in DSpace on 2011-07-11T14:17:02Z (GMT). No. of bitstreams: 1 1968_stotland.pdf: 3649453 bytes, checksum: f0351f6e1ee5c1db2e658965e56c4672 (MD5) Previous issue date: 1968 Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Carolyn Mead (cmead2@illinois.edu) on 2011-07-11T14:17:02Z Item is restricted indefinitely. Restriction data tranferred 2014-07-01T11:33:06-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: Thesis Thesis U of I Only 6083056 http://hdl.handle.net/2142/25745 en 1968 Victor G. Stotland direct-sequential order-of-emission interference effect solid-state detectors Breit-Wigner line shapes Direct-sequential order-of-emission interference effect Dissertation / Thesis text Physics Physics University of Illinois at Urbana-Champaign Dissertation Ph.D.