Mixed optical Cherenkov–Bremsstrahlung radiation in vicinity of the Cherenkov cone from relativistic heavy ions: Unusual dependence of the angular distribution width on the radiator thickness

Mass dependence of spectral and angular distributions of Cherenkov radiation from relativistic isotopes in solid radiators and its possible application as mass selector

“…This theory ignores decreasing of RHI velocity due to ionization energy loss. Authors [5] established a more refined approach, which includes the calculation of the energy loss and decrease of RHI velocity depending on penetration depth in the solid radiator. In the calculations the thickness of the radiator L is divided into N number of segments and the energy loss at each segment length ∆x = L/N may be calculated using the modern packages SRIM 2013 [12] or ATIMA [13].…”

“…The new models [4,5] predict that at the FRS and Super-FRS energies the energy loss of the ions in the radiator leads to broadening and appearing of the complex diffraction structures of the spectral and angular distributions. These distributions are very sensitive to the charge and velocity of RHI and radiator thickness [5,8], thus the experiments with the Super-FRS will contribute to the detailed understanding of ChR from RHI ions and will lay the ground for improved and novel detector developments, like velocity selector [9].…”

“…The spectral-angular distributions of Cherenkov radiation (ChR) from relativistic heavy ions (RHI) with account of energy loss in solid radiators show complicated diffraction-like structures, see [4,5] and references therein, which differ from Tamm-Frank [6] distributions. The width and shape of these structures depend on the mean ionization energy loss, which depends on the RHI mass through the maximum energy transfer in a single collision [7].…”