Kr L X-ray and Au M X-ray emission for 1.5 MeV—3.9 MeV Kr¹³⁺ions impacting on an Au target

Abstract

Kr L X-ray and Au M X-ray emission for Kr13+ ions with energies of 1.5 MeV and 3.9 MeV impacting on an Au target are investigated at heavy ion research facility in Lanzhou (HIRFL). The L-shell X-ray yield per ion of Kr is measured as a function of incident energy. In addition, Kr L X-ray production cross section is extracted from the yield and compared with the result obtained from the classical binary-encounter approximation (BEA) model. Furthermore, the intensity ratio of the Au Mβ3 to Mα1 X-ray is investigated as a function of incident energy.

Direct mass measurements of neutron-rich 86 Kr projectile fragments and the persistence of neutron magic number N =32 in Sc isotopes

“…Hence, the velocity spread of injected ions is compensated by their orbit lengths and thus the revolution times directly reflect m/q ratios of the stored ions [27]. At each revolution, the stored ions passed through a dedicated timing detector [28] equipped with a 19 µg/cm 2 thin carbon foil of 40 mm in diameter installed inside CSRe. When passing through, the ions lose energy so that secondary electrons are released from this foil.…”

X-ray emission for Ar11+ ions impacting on various targets in the collisions near the Bohr velocity*

“…The inner-shell process of projectile and target atoms can be observed simultaneously. Due to the limitation of experimental conditions, although a few works have been carried out to study separately the x-ray emission from projectile or target atoms, [31][32][33][34][35][36][37][38] the research investigating simultaneously the two phenomena is rare. It is also unclear for the correlation between the x-ray emission from projectile and target atoms, which respect to the distribution of energy loss between the projectile and target atoms.…”

X-ray emission from 424-MeV/u C ions impacting on selected target

“…The x-ray emission is an important consequential result from the inner-shell ionization during the interaction of highly charged ions with atoms, which provides significant information about atom configuration and the mechanism of such collisions. [6][7][8][9] In the middle and low energy region, lots of experimental work has been done on the inner-shell ionization by measuring the x-ray production cross sections, and many successful theories, such as binary encounter approximation (BEA) [10] and plane wave approximation (PWBA) [11] have been established to simulate the process. Especially, the energy-loss Coulomb-repulsion perturbed-stationary-state relativistic (ECPSSR) model, [12] which is a modification of PWBA by considering effects such as energy loss (E) and Coulomb deflection (C) of the projectile, modification of the atomic electron energy states through a perturbed stationary states model and adjustment of the electron mass due to relativistic effects (R), provides an excellent prediction of innershell ionization by light ions and has also been successfully applied to asymmetric heavy-ion collision of Z 1 < Z 2 .…”