Junghans,%20H.
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Total charge-changing cross sections for neutron-deficient isotopes from $^{58}$Ni fragmentation

Blank, B. ; Andriamonje, S. ; Del Moral, R. ; et al.
Z.Phys.A 352 (1995) 69-75, 1995.
Inspire Record 1389077 DOI 10.17182/hepdata.16503

At the projectile-fragment separator FRS of GSI, relativistic secondary beams of about 520 MeV/nucleon were produced by fragmentation of a primary beam of58Ni at 650 MeV/nucleon in a beryllium target. By means of aΔE—Bρ—TOF measurement, the fragments have been identified and their charge-changing probabilities in targets of CH2, C, Al, and Pb have been determined. We describe the results for the total charge-changing cross sections in this first paper, whereas a second article deals with the partial charge-changing cross sections. At the drip line, the measured charge-changing cross sections exhaust close to 100% of the total interaction cross sections as calculated with semiempirical models. The measurements at the proton drip line with low-Z targets indicate that only a very small increase of the cross sections may be observed, whereas the measurements with a lead target show that no significant increase of the total charge-changing cross sections is present which would be a hint for low-lying dipole strength. Our experimental data are compared to Glauber-type calculations.

24 data tables
Table 1

Nucleus is C H2.

Table 2

Nucleus is C H2.

Table 3

Nucleus is C H2.

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Forward K+ production in subthreshold p A collisions at 1.0-GeV.

The ANKE collaboration Koptev, V. ; Buescher, Markus ; Junghans, H. ; et al.
Phys.Rev.Lett. 87 (2001) 022301, 2001.
Inspire Record 556676 DOI 10.17182/hepdata.31765

K+ meson production in pA (A = C, Cu, Au) collisions has been studied using the ANKE spectrometer at an internal target position of the COSY-Juelich accelerator. The complete momentum spectrum of kaons emitted at forward angles, theta < 12 degrees, has been measured for a beam energy of T(p)=1.0 GeV, far below the free NN threshold of 1.58 GeV. The spectrum does not follow a thermal distribution at low kaon momenta and the larger momenta reflect a high degree of collectivity in the target nucleus.

3 data tables
Table 1

Double differential K+ production cross section for forward K+ angles < 12 degs. Statistical errors only.

Table 2

The invariant cross section for K+ production. Statistical errors only.

Table 3

Ratio of K+ production cross sections for CU/C and AU/C.


Few neutron removal from U-238 at relativistic energies

Aumann, T. ; Sümmerer, K. ; Geissel, H. ; et al.
Z.Phys.A 352 (1995) 163-169, 1995.
Inspire Record 393469 DOI 10.17182/hepdata.42069

As part of a comprehensive study of uranium fragmentation at relativistic energies at the GSI projectile fragment separator, FRS, inclusive neutron-removal cross sections have been measured for severalxn channels at projectile energies of 600 and 950A MeV using targets of Al, Cu and Pb. The variation of the experimental cross sections with target nuclear charge is used to disentangle nuclear and electromagnetic contributions. The electromagnetic cross sections agree surprisingly well with a simple harmonic oscillator calculation of giant dipole resonances based on measured photonuclear cross sections and do not require an extra enhancement of the two-phonon giant dipole excitation as concluded from similar measurements with197Au.

2 data tables
Table 1

Uranium fragmentation.

Table 2

Uranium fragmentation.