Aston, D.
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Neutron yields from 435 MeV/nucleon Nb stopping in Nb and 272 MeV/nucleon Nb stopping in Nb and Al

Heilbronn, L. ; Madey, R. ; Elaasar, M. ; et al.
Phys.Rev.C 58 (1998) 3451-3461, 1998.
Inspire Record 487027 DOI 10.17182/hepdata.25689

Neutron fluences were measured from 435 MeV/nucleon Nb ions stopping in a Nb target and 272 MeV/nucleon Nb ions stopping in targets of Nb and Al for neutrons above 20 MeV and at laboratory angles between 3° and 80°. The resultant spectra were integrated over angles to produce neutron energy distributions and over energy to produce neutron angular distributions. The total neutron yields for each system were obtained by integrating over the angular distributions. The angular distributions from all three systems are peaked forward, and the energy distributions from all three systems show an appreciable yield of neutrons with velocities greater than the beam velocity. Comparison of the total neutron yields from the two Nb+Nb systems suggests that the average neutron multiplicity decreases with decreasing projectile energy. Comparison of the total yields from the two 272 MeV/nucleon systems suggests that the total yields show the same dependence on projectile and target mass number as do total inclusive neutron cross sections. The data are compared with Boltzmann-Uehling-Uhlenbeck model calculations.

2 data tables
Table 1

No description provided.

Table 2

No description provided.


K+ production in the reaction Ni-58 + Ni-58 at incident energies from 1-A-GeV to 2-A-GeV.

The FOPI collaboration Best, D ; Herrmann, N ; Hong, B ; et al.
Nucl.Phys.A 625 (1997) 307-324, 1997.
Inspire Record 441884 DOI 10.17182/hepdata.36288

Semi-inclusive triple differential multiplicity distributions of positively charged kaons have been measured over a wide range in rapidity and transverse mass for central collisions of $^{58}$Ni with $^{58}$Ni nuclei. The transverse mass ($m_t$) spectra have been studied as a function of rapidity at a beam energy 1.93 AGeV. The $m_t$ distributions of K^+ mesons are well described by a single Boltzmann-type function. The spectral slopes are similar to that of the protons indicating that rescattering plays a significant role in the propagation of the kaon. Multiplicity densities have been obtained as a function of rapidity by extrapolating the Boltzmann-type fits to the measured distributions over the remaining phase space. The total K^+ meson yield has been determined at beam energies of 1.06, 1.45, and 1.93 AGeV, and is presented in comparison to existing data. The low total yield indicates that the K^+ meson can not be explained within a hadro-chemical equilibrium scenario, therefore indicating that the yield does remain sensitive to effects related to its production processes such as the equation of state of nuclear matter and/or modifications to the K^+ dispersion relation.

1 data table
Table 1

No description provided.


Phi emission in central Pb + Pb collisions at 158-GeV/u.

The NA49 collaboration Pühlhofer, Falk ; Appelshäuser, H. ; Bächler, J. ; et al.
Nucl.Phys.A 638 (1998) 431-434, 1998.
Inspire Record 481889 DOI 10.17182/hepdata.36218

Data on φ -production obtained by the CERN NA49 experiment for central Pb+Pb collisions at 158 GeV/u are presented. Compared with pp interactions the φ -yield shows substantial strangeness enhancement: the φ /π ratio is found to increase by a factor of 2.6 ± 0.6, which is approximately the square of the K/π enhancement.

2 data tables
Table 1

5% most central collosions, MT - M0 = 0 - 1.4 GeV, preliminary data.

Table 2

5% most central events.


Kaon and proton ratios from central Pb + Pb collisions at the CERN SPS.

The NA44 collaboration Kaneta, M. ; Bearden, I.G. ; Bøggild, H. ; et al.
Nucl.Phys.A 638 (1998) 419-422, 1998.
Inspire Record 481886 DOI 10.17182/hepdata.36250

K − /K + and p ¯ / p ratios measured in 158 A·GeV Pb+Pb collisions are shown as a function of transverse momentum P T and centrality in top 8.5% central region. Little centrality dependence of the K − / K + and p ¯ / p ratios is observed. The transverse mass m T distribution and dN/dy of K + , K − , p and p ¯ around mid-rapidity are obtained. The temperature T ch and the chemical potentials for both light and strange quarks (μ q , μ s ) at chemical freeze-out are determined by applying simple thermodynamical model to the present data. The resultant μ q , μ s and T ch are compared with those obtained from similar analysis of SPS S+A and AGS Si+A data. The chemical freeze-out temperature T ch at CERN energies is higher than thermal freeze-out temperature T fo which is extracted from m T distribution of charged hadrons. At AGS energies T ch is close to T fo .

2 data tables
Table 1

Data obtained from the fit of MT spectra.

Table 2

Data obtained from the fit of MT spectra.


Inclusive spectra of pi- mesons with cumulative number n(c) > 0.35 produced in d C, He C, and C C interactions at 4.2-GeV/c per nucleon.

Baatar, Ts. ; Batsaikhan, Ts. ; Ivanovskaya, I.A. ; et al.
Sov.J.Nucl.Phys. 53 (1991) 292-296, 1991.
Inspire Record 295859 DOI 10.17182/hepdata.38726

None

2 data tables
Table 1

No description provided.

Table 2

No description provided.


INCLUSIVE CROSS-SECTIONS OF CUMULATIVE PI- MESON PRODUCTION IN PI- C INTERACTIONS AT 40-GEV/C AS FUNCTIONS OF KINETIC AND TRANSVERSE ENERGIES. (IN RUSSIAN)

Baatar, Ts. ; Batsaikhan, Ts. ; Khurelbaatar, B. ; et al.
Sov.J.Nucl.Phys. 53 (1991) 282-285, 1991.
Inspire Record 287539 DOI 10.17182/hepdata.38754

None

3 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.


Cumulative production of pi- mesons in pi C interactions at 40-GeV/c

Baatar, Ts. ; Batsaikhan, Ts. ; Ivanovskaya, I.A. ; et al.
Sov.J.Nucl.Phys. 52 (1990) 504-508, 1990.
Inspire Record 299082 DOI 10.17182/hepdata.38727

None

7 data tables
Table 1

HERE XL IS CUMULATIVE NUMBER, DEFINED AS FOLLOWS: (E-PL)/M(NUCLEON). THE DISTRIBUTION (1/N)*D(N)/D(XL) WAS FITTED BY THE SUM: CONST(1)* EXP(-SLOPE(1)*XL)+CONST(2)*EXP(-SLOPE(2)*XL).

Table 2

HERE XL IS CUMULATIVE NUMBER, DEFINED AS FOLLOWS: (E-PL)/M(NUCLEON). THE DISTRIBUTION (XL/N)*D(N)/D(XL) WAS FITTED BY THE SUM: CONST(1)* EXP(-SLOPE(1)*XL)+CONST(2)*EXP(-SLOPE(2)*XL).

Table 3

HERE XL IS CUMULATIVE NUMBER, DEFINED AS FOLLOWS: (E-PL)/M(NUCLEON).

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Dependence of $\pi^-$ Meson Spectra at Fixed Angles on the Atomic Weight of Projectile in Interactions Between Light Nuclei ($p$, $d$, $\alpha$, C) and Carbon Nucleus at 4.2-{GeV}/$c$ Per Nucleon

Agakishiev, G.N. ; Armutliiski, D. ; Backovic, S. ; et al.
Sov.J.Nucl.Phys. 51 (1990) 1004-1007, 1990.
Inspire Record 287327 DOI 10.17182/hepdata.38755

None

17 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Hadron spectra in hadron - nucleus collisions

Armutliiski, D. ; Baatar, Ts. ; Batsaikhan, Ts. ; et al.
JINR-P1-91-191, 1991.
Inspire Record 319258 DOI 10.17182/hepdata.38698

None

6 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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THE DEPENDENCE OF CHARACTERISTICS OF pi+- MESONS PRODUCED IN pi- C INTERACTIONS AT 40-GeV/c ON TOTAL ENERGY IN THE CMS AND QCD OF SEMIHARD PROCESS

Baatar, Ts. ; Ivanovskaya, I.A. ; Serdamba, L. ; et al.
JINR-P1-88-469, 1988.
Inspire Record 267040 DOI 10.17182/hepdata.38869

None

3 data tables
Table 1

THE MULTIPLICITY OF CHARGED PIONS HAS BEEN FITTED BY THE FORMULA: MULT(PI+-)=CONST(Q=1)+CONST(Q=2)*EXP(+SLOPE*2*SQRT(LN(S))), WHERE S IS THE TOTAL ENERGY SQUERED OF THE SYSTEM PROJECTILE - PARTICIPATOR AND IS DEFINED AS 2*E(P=1)*(TARGET MASS), WHERE TARGET MASS HAS BEEN OBTAINED AS A SUM OF (E-PL) OVER SECONDARY PARTICLES.

Table 2

THE AVERAGE PT OF CHARGED PIONS HAS BEEN FITTED BY THE FORMULA: MEAN(N=PT)=CONST(Q=1)+CONST(Q=2)*EXP(SLOPE*SQRT(LN(S))), WHERE S IS THE TOTAL ENERGY SQUERED OF THE SYSTEM PROJECTILE - PARTICIPATOR AND IS DEFINED AS 2*E(P=1)*(TARGET MASS), WHERE TARGET MASS HAS BEEN OBTAINED AS A SUM OF (E-PL) OVER SECONDARY PARTICLES.

Table 3

THE AVERAGE PT**2 OF CHARGED PIONS HAS BEEN FITTED BY THE FORMULA: MEAN(N=PT**2)=CONST(Q=1)+CONST(Q=2)*EXP(SLOPE*SQRT(LN(S))), WHERE S IS THE TOTAL ENERGY SQUERED OF THE SYSTEM PROJECTILE - PARTICIPATOR AND IS DEFINED AS 2*E(P=1)*(TARGET MASS), WHERE TARGET MASS HAS BEEN OBTAINED AS A SUM OF (E-PL) OVER SECONDARY PARTICLES.