Archivio Istituzionale della RicercaThe simultaneous measurement of the spatial coordinates and times of p¯s annihilating at rest in a H2 target at very low density ρ (ρ/ρ0<10-2, ρ0 being the STP density) gives the possibility of evaluating the behavior of the p¯ stopping power in H2 at low energies (below 120 keV). It is different from that of protons (the Barkas effect). Moreover, it is shown that a rise at low-energy values (≲1 keV) is needed to agree with experimental data.
Antiproton stopping power in hydrogen below 120 keV and the Barkas effect / A., A., Agnello, M., F., B., G., B., G., B., A., B., P., B., G. C., B., T., B., M., B., M. P., B., L., B., D., C., M., C., M., C., S., C., S., D.C., D., D., I. V., F., L., F., et al.. - In: PHYSICAL REVIEW A. - ISSN 1050-2947. - 47:5(1993), pp. 4517-4520. [10.1103/PhysRevA.47.4517]
Antiproton stopping power in hydrogen below 120 keV and the Barkas effect
AGNELLO, MICHELANGELO;IAZZI, Felice;MINETTI, Bruno;
1993
Abstract
The simultaneous measurement of the spatial coordinates and times of p¯s annihilating at rest in a H2 target at very low density ρ (ρ/ρ0<10-2, ρ0 being the STP density) gives the possibility of evaluating the behavior of the p¯ stopping power in H2 at low energies (below 120 keV). It is different from that of protons (the Barkas effect). Moreover, it is shown that a rise at low-energy values (≲1 keV) is needed to agree with experimental data.
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https://hdl.handle.net/11583/1402663
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