Die Energieabhängigkeit des Wirkungsquerschnitts der Reaktion Li7 (γ, α) H3

Stoll, P.; Wachter, Margot

doi:10.1007/bf02786206

Cited by 9 publications

(1 citation statement)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…By comparing these results with cross-section measurements which were carried out by Titterton (1953), who used 14·8 and 17·6 MeV y-rays, from the 7Li(p,y)8Be reaction, an approximate integrated cross section of 0·2 X 10-3 MeV barns can be associated with this level. Stoll and Wachter (1953), Erdos et al (1954), , and Miwa (1955) have also found resonance absorption of y-rays between 9·0 and 9·5 MeV in similar experiments. Goldemberg and Katz (1954) have measured an integral spectrum for the reaction 7Li(y,n)6Li; their results show a prominent break in the yield curve which they ascribe to a level in 7Li at 9·6 MeV, and their approximate integrated cross section is also 0·2 X 10-3 Me V barns.…”

Section: Evidence For Level Of 7li At 9·3 Mev and Its Possible Ohmentioning

confidence: 54%

A Search for Levels of 7Li Between 9·0 and 9·55 MeV Excitation

Purser¹

1959

Aust. J. Phys.

View full text Add to dashboard Cite

SummaryThe cross section of the reaction 6Li(n,3H)'He has been measured, with good energy resolution, over the neutron range 2·0--2·65 MeV. This corresponds to an excitation of 7Li from 9· 0 to 9· 55 MeV, a region in which photodisintegration experiments indicate the presence of one or more levels. No resonance structure was observed in this experiment and possible reasons for this are discussed. Kern and Kreger 1958). These results show that, with the exception of the broad p-wave resonance at 255 keV, no resonance structure is apparent over the whole of the measured energy range. This is surprising as several fairly well-established levels are known to be present in the compound system, 7Li*. " In the experiments reported here, the cross section of 6Li(n,3H)4He was measured, with good energy resolution, over a neutron energy range 2 ·0-2 . 65 MeV; this corresponds to an excitation of the compound 7Li system from 9·0 to 9 ·55 MeV where a fairly well-established level of 7Li is known to be present (Ajzenberg and Lauritsen 1955). From a knowledge of the neutron and triton partial widths which have been established for this level by y-ray absorption experiments it would appear that, to an order of magnitude, the resonance cross section to this level by neutron absorption in 6Li should be several hundred millibarns. The experimental techniques used here were Sufficiently sensitive so that a 10 per cent. change in the cross-section curve having a 40 keV half-width should be readily detected.

show abstract