Intensity measurements on ?-hyperonic and kaonic atoms

Abstract

Abstract. 2;-hyperonic X-ray lines have been observed in 8 elements and their intensities as well as those of the accompaning kaonic X-ray lines have been determined. The 2;-atomic cascade has been found to be similar to those of other exotic atoms. The production of S-hyperons per stopped K-has been measured by comparing their X-ray intensities. For the first time the intensity attenuation due to the strong absorptive 2;N interaction could be measured in four cases, and simple optical model calculations have been performed in order to reproduce the data.

Measurement of the 4f strong interaction level width in light antiprotonic atoms

“…In order to resolve these problems, we have to compare the measured intensity values with cascade calculations 9 For this we use a code based on a cascade program written by Hiifner [5], and described in more detail in [6]. The intensities of the X-ray transitions are calculated by starting the atomic cascade at n--40 and assuming a modified initial statistical population of the form P4o,t=(21 +l)e ~l, the P40,z normalized such that ZtP, oa=l.…”

“…In addition to what was described in [6], the absorption was included in the code. The experimental strong-interaction widths F~o w of the lower level (see [2]) and the initial values F~ * for the upper levels are given as input parameters (Fu ~ is a fit parameter).…”

Strong interaction effects in Σ- atoms

“…In the atomic state that the effects of the strong interaction start to happen and also in the following states, we have a variation in the intensity of the X-ray transition of the spectrum. This change occurs in the shift and the width of the spectral line [1,2,3,4].…”

“…The second experiment took place at CERN in 1975 [2]. They observed X-ray transitions in E~-atoms in eight elements: C, P, Ca, Ti, Zn, Nb, Cd, Ba (Z varies from 6 to 56).…”

“…The heaviest particle observed so far in an atomic orbit is Σ~hyperon. The study of Σ~ hyperonic atoms is very interesting and can be used for the measurement of Σ~ magnetic moment, the study of nuclear properties and the understanding of ΣΝ interaction and generally of the hyperon-nucleon interaction [2].…”