PIGE Data for Material Analysis from Nuclear Astrophysics and other Sources

Full text: The literature search for nuclear data important for material analysis with proton induced γ-ray emitting reactions proved to be successful in particular in the nuclear astrophysics literature. Many reactions have now been included in IBANDL. Some examples are presented. More specific details are discussed at the example of data for the ²⁷Al(p,γ)²⁸Si reaction, where data are available measured angle integrated and summed over all cascades in the exit channel. These data as well as many other cases contain information about resonances, which are useful for depth profiling. Here however the concept of tabulating the energy dependence of measured yields or cross sections fails for narrow resonances; a measurement gives the integral over the resonance and the essential quantity is the resonance strength. Therefore it is suggested to have for those cases an additional entry in IBANDL, listing resonance strength for resonances used in ion beam analysis. Data for the resonance at 6.4 MeV in the ¹H(¹⁵N,αγ)¹²C reaction, which is widely used for hydrogen depth profiling could be gained in digital form. However, the IBANDL web site does not allow at present to choose ¹⁵N as an ion beam, so this data as well as data for ¹⁹F or ¹⁸O have either to be included together with the data for the reactions in inverse kinematics or additional entries are necessary for these cases. More generally the goals and the present achievements of the CRP in providing PIGE data were discussed and compared with the particle data in IBANDL. Some ideas and suggestions for future activities were put up for discussion. (author)