/* 2004-11-29 FILE IS GENERATED BY HENDEL */
\\BIB,1[6;
D#=D1797;
TITLE=/Isobaric analog state of 14Be/;
PURPOSE=/To measure the Isobaric Analog State (IAS) of the
neutron-dripline nucleus 14Be for the first time in a
charge-exchange reactino 14Be(p,n)14B* in inverse kinematics
at E(14Be) = 74 AMeV./;
ATH=(S.TAKEUCHI'1', S.SHIMOURA'2', T.MOTOBAYASHI'1', H.AKIYOSHI'3',
Y.ANDO'1', N.AOI'4', ZS.FULOP'5', T.GOMI'1', Y.HIGURASHI'1',
M.HIRAI'6', N.IWASA'7', H.IWASAKI'2', Y.IWATA'6',
H.KOBAYASHI'1', M.KUROKAWA'2', Z.LIU'8', T.MINEMURA'3',
S.OZAWA'3', H.SAKURAI'4', M.SERATA'1', T.TERANISHI'2',
K.YAMADA'1', Y.YANAGISAWA'3', M.ISHIHARA'3');
INST-ATH=(2JPNYOK'1', 2JPNTOK'2', 2JPNIPC'3', 2JPNTOK'4', 3HUNDEB'5',
2JPNIRS'6', 2JPNTOH'7', 3CPRIMP'8');
/* '1' Department of Physics */
/* '2' Center for Nuclear Study (CNS) */
/* '4' Department of Physics */
/* '7' Department of Physics */
REF=PL/B;
VLP=515(2001)255;
RCTS=(P(14BE,14B)N, D(14BE,14B)X);
PHQS=(ENGY-SPEC, ANGL-DSTRN, X'9', X'10', COULOMB-DISP-ENGY'11');
/* '9' Energy and width of the peak of the decay energy spectra of
the 12Be + p + n channel for the (p,n) reaction */
/* '10' Excitation energy of the IAS */
/* '11' Coulomb displacement energy for the pair of 14Be and its
IAS. */
\\EXP,1[6;
/* 2003-07-09 : Compiled */
ENR=X%;
PHYS-FORM=SLD;
BAC=X;
POL-TGT=0%;
ALGN-TGT=0%;
ACC=(CYC'12',PRJFS'13');
/* '12' Primary beam of 100 AMeV 18O on a 1110 mg/cm**2 thic 9Be
target */
/* '13' Secondary beam of 14Be selected by the RIKEN Projectile
Fragment Separator (RIPS) [T.Kubo et al., Nucl. Instrum. Methods
B70(1992)309]. */
INST-ACC=(2JPNIPC'12',2JPNIPC'13');
INC-ENGY-LAB=74MEV/A;
ERS-PRJ=8MEV/A;
BEAM-INTNSTY=1e4PPS'14';
/* '14' Typical intensity of the 14Be beam with a purity of
around 80% */
POL-PRJ=0%;
DET-PARTCL=(P,N,12BE);
COINC=(P,N,12BE);
ANT-COINC=NO;
DET-SYS=(PLST-SCT'15',TOF'16');
/* '15' To detect decay particles from 14B*. Resolutions of TOF
were about 1.2% (FWHM) for charged particles and about
1.5%(FWHM) for neutrons at the energies of 74 AMeV. */
/* '16' To determine velocities of the decay particles */
ERS-DET=0.15MEV'17';
/* '17' Resolution of decay energy at 0.3 MeV */
/* Experimental Method:
- Time-of-flight (To determine velocities of the decay particles)
*/
/* Analysis:
- Invariant mass method
*/
\\EXP,1;
RCT=P(14BE,14B)N;
PHQ=ENGY-SPEC;
CHM=CH2'18';
/* '18' (CH2)n and C target are used, C target was used to
subtract the contributions of carbon nuclei in the (CH2)n
target. */
THK-TGT=XMG/CM**2'19';
/* '19' 187 and 152 mg/cm2 for (CH2)n and C target, respectively.
*/
\\DATA,1;
INC-ENGY-LAB=74MEV/A;
SYS-ERR=10%'20';
/* '20' Uncertainties for corrected and uncorrected spectra due
to neutron detection efficiency and the reaction losses of the
charged particles in hodoscope. */
EMT-1=12BE;
RSD=N;
\DATA;
EXC-ENGY-EMT'21' DATA1'22' DSIGMA/DE DELTA-DSIGMA/DE'23'
DATA2'24' DELTA-DATA2'24' FLAG'25'
(MEV) (MEV) (MB/MEV) (MB/MEV) (MB/MEV) (MB/MEV) (NODIM)
16.770 0.000 0.000 +-X 0.000 +-X 1
16.845 0.075 -0.442 +-0.442 -0.023 +-0.023 2
16.895 0.125 0.627 +-0.362 0.058 +-0.034 X
16.945 0.175 0.432 +-0.350 0.056 +-0.045 X
16.995 0.225 1.578 +-0.498 0.267 +-0.084 X
17.045 0.275 2.208 +-0.522 0.459 +-0.109 X
17.095 0.325 1.417 +-0.404 0.342 +-0.097 X
17.170 0.400 0.862 +-0.208 0.238 +-0.057 X
17.270 0.500 0.368 +-0.118 0.116 +-0.037 X
17.370 0.600 0.276 +-0.099 0.096 +-0.034 X
17.495 0.725 0.316 +-0.080 0.116 +-0.029 X
17.645 0.875 0.273 +-0.079 0.102 +-0.030 X
17.820 1.050 0.256 +-0.075 0.094 +-0.027 X
18.020 1.250 0.244 +-0.077 0.084 +-0.027 X
18.220 1.450 0.429 +-0.093 0.134 +-0.029 X
18.445 1.675 0.474 +-0.107 0.127 +-0.029 X
18.695 1.925 0.434 +-0.134 0.101 +-0.030 X
18.970 2.200 0.611 +-0.141 0.114 +-0.026 X
19.270 2.500 0.658 +-0.153 0.097 +-0.022 X
19.595 2.825 0.847 +-0.179 0.097 +-0.021 X
\END;
/* Data (Fig.2 (a) and (c), p258 in reference) obtained from web site
of S.Takeuchi */
/* '21' Excitation energy of 14B calculated by E(d) + 16.77 MeV
where E(d) is decay energy defined in Eq. (1) of the
reference. Threshold energy is 16.77 MeV for the 12Be + p + n
channel. */
/* '22' Decay energy E(d) defined in Eq.(1) of the reference */
/* '23' Statistical error */
/* '24' Energy spectra which are not corrected by acceptance */
/* '25'
FLAG(1.) 0 count for CH2 target and for C target. Upper limits
are 0.226 and 0.045 for corrected and uncrrected spectra,
respectively.
(2.) 0 count for CH2 target and 1 count for C target
*/
\\EXP,2;
RCT=D(14BE,14B)X;
PHQ=ENGY-SPEC;
CHM=CD2'26';
/* '26' (CD2)n and C target are used, C target was used to
subtract the contributions ofcarbon nuclei in the (CD2)n
target. */
THK-TGT=XMG/CM**2'27';
/* '27' 204 and 152 mg/cm2 for (CD2)n and C target, respectively.
*/
\\DATA,2;
INC-ENGY-LAB=74MEV/A;
SYS-ERR=10%'28';
/* '28' Uncertainties in neutron detection efficiency and the
reaction losses of the charged particles in hodoscope. */
EMT-1=12BE;
\DATA;
ENGY-EMT'29' DATA1'30' DATA2'31' DELTA-DATA2'31,32' FLAG'33'
(MEV) (MEV) (MB/MEV) (MB/MEV) (NODIM)
16.770 0.000 0.000 +-X 1
16.845 0.075 -0.023 +-0.023 2
16.900 0.130 0.000 +-X 1
16.945 0.175 0.035 +-0.047 X
16.995 0.225 0.100 +-0.072 X
17.045 0.275 0.077 +-0.086 X
17.095 0.325 0.013 +-0.080 X
17.170 0.400 0.114 +-0.059 X
17.270 0.500 0.090 +-0.040 X
17.370 0.600 0.047 +-0.037 X
17.495 0.725 0.033 +-0.043 X
17.645 0.875 0.014 +-0.033 X
17.820 1.050 0.017 +-0.028 X
18.020 1.250 0.056 +-0.034 X
18.220 1.450 0.025 +-0.030 X
18.445 1.675 0.039 +-0.041 X
18.695 1.925 0.076 +-0.049 X
18.970 2.200 0.090 +-0.039 X
19.270 2.500 0.057 +-0.038 X
19.595 2.825 0.026 +-0.026 X
\END;
/* Data (Fig.2 (b), p258 in reference) obtained from web site of
S.Takeuchi */
/* '29' Excitation energy of 14B calculated by E(d) + 16.77 MeV
where E(d) is decay energy defined in Eq. (1) of the
reference. Threshold energy is 16.77 MeV for the 12Be + p + n
channel. */
/* '30' Decay energy E(d) defined in Eq.(1) of the reference */
/* '31' Energy spectra which are not corrected by acceptance */
/* '32' Statistical error */
/* '33'
FLAG(1.) 0 count for CH2 target and for C target. Upper limit are
0.667.
(2.) 0 count for CH2 target and 1 count for C target.
*/
/* Critique to data: Given spectrum are not corrected with respect to
detector acceptance. */
\\EXP,3;
RCT=P(14BE,14B)N;
PHQ=ANGL-DSTRN;
CHM=CH2'34';
/* '34' (CH2)n and C target are used, C target was used to
subtract the contributions of carbon nuclei in the (CH2)n
target. */
THK-TGT=XMG/CM**2'35';
/* '35' 187 and 152 mg/cm2 for (CH2)n and C target, respectively.
*/
ANL=PWBA'36';
/* '36' nine */
\\DATA,3;
INC-ENGY-LAB=74MEV/A;
SYS-ERR=10%'37';
/* '37' Source is unknown. */
EMT-1=12BE;
RSD=N;
EXC-ENGY=17.06MEV'38';
/* '38' Excitation energy of IAS relative to the ground state of
14B. */
DELTA-EXC-ENGY=0.03MEV;
TRNSF-L=0'39';
/* '39' Transferred angular momentum */
\DATA;
THTL DSIGMA/DOMEGA'40' DELTA-DSIGMA/DOMEGA'40,41'
(DEG) (MB/SR) (MB/SR)
0.208 230.777 +-81.592
0.625 115.187 +-43.297
1.042 107.614 +-29.036
1.458 62.216 +-24.482
1.875 42.634 +-17.405
2.292 21.424 +-12.369
2.708 7.007 +-7.007
3.125 14.342 +-10.141
\END;
/* Data (Fig.3, p258 in reference) obtained from web site of
S.Takeuchi */
/* '40' Angular distribution of 14B* for the delta S=0 peak */
/* '41' Statistical error */
\\EXP,4;
RCT=P(14BE,14B)N;
PHQ=X'42';
/* '42' Energy and width of the peak of the decay energy spectra
of the 12Be + p + n channel for the (p,n) reaction */
CHM=CH2'43';
/* '43' (CH2)n and C target are used, C target was used to
subtract the contributions of carbon nuclei in the (CH2)n
target. */
THK-TGT=XMG/CM**2'44';
/* '44' 187 and 152 mg/cm2 for (CH2)n and C target, respectively.
*/
/* Analysis:
- In order to deduce the resonance energy and natural width of
the IAS, the peak of decay energy spectra was fitted with a
Gaussian functio and a background with a shape of a three-body
phase space (see Fig.2(c) of reference). The E(d) resolution
detector acceptance and angular distribution of 14B* were taken
into account in the fitting procedure.
*/
\\DATA,4;
INC-ENGY-LAB=74MEV/A;
EMT-1=12BE;
RSD=N;
\DATA;
ENGY'45' DELTA-ENGY'45' WDTH'46' DELTA-WDTH'46'
(MEV) (MEV) (MEV) (MEV)
0.29 +-0.02 0.11 +-0.05
\END;
/* Data taken from the text, p259 in reference */
/* '45' Energy of the peak of the decay energy spectra of the
12Be + p + n channel for the (p,n) reaction. In order to
deduce the resonance energy and natural width of the IAS, the
peak of decay energy spectra was fitted with a Gaussian
functio and a background with a shape of a three-body phase
space (see Fig.2(c) of reference). The E(d) resolution
detector acceptance and angular distribution of 14B* were
taken into account in the fitting procedure. The errors
contain the statistical one and the systematic uncertainty in
the absolute magnitude of TOF. */
/* '46' Width of the peak of the decay energy spectra of the 12Be
+ p + n channel for the (p,n) reaction. In order to deduce the
resonance energy and natural width of the IAS, the peak of
decay energy spectra was fitted with a Gaussian functio and a
background with a shape of a three-body phase space (see
Fig.2(c) of reference). The E(d) resolution detector
acceptance and angular distribution of 14B* were taken into
account in the fitting procedure. The errors contain the
statistical one and the systematic uncertainty in the absolute
magnitude of TOF. */
\\EXP,5;
RCT=P(14BE,14B)N;
PHQ=X'47';
/* '47' Excitation energy of the IAS */
CHM=CH2'48';
/* '48' (CH2)n and C target are used, C target was used to
subtract the contributions of carbon nuclei in the (CH2)n
target. */
THK-TGT=XMG/CM**2'49';
/* '49' 187 and 152 mg/cm2 for (CH2)n and C target, respectively.
*/
/* Analysis:
- In order to deduce the resonance energy of the IAS, the peak of
decay energy spectra was fitted with a Gaussian functio and a
background with a shape of a three-body phase space (see Fig.2(c)
of reference). The E(d) resolution detector acceptance and
angular distribution of 14B* were taken into account in the
fitting procedure.
*/
\\DATA,5;
INC-ENGY-LAB=74MEV/A;
EMT-1=12BE;
RSD=N;
\DATA;
EXC-ENGY'50' DELTA-EXC-ENGY'50' WDTH DELTA-WDTH
(MEV) (MEV) (MEV) (MEV)
17.06 +-0.03 0.11 +-0.05
\END;
/* Data taken from the text, p259 in reference */
/* '50' The excitation energy of the IAS with respect to the
ground state of 14B. In order to deduce the resonance energy
of the IAS, the peak of decay energy spectra was fitted with a
Gaussian function and a background with a shape of a
three-body phase space (see Fig.2(c) of reference). The E(d)
resolution detector acceptance and angular distribution of
14B* were taken into account in the fitting procedure. */
\\EXP,6;
RCT=P(14BE,14B)N;
PHQ=COULOMB-DISP-ENGY'51';
/* '51' Coulomb displacement energy for the pair of 14Be and its
IAS. */
CHM=CH2'52';
/* '52' (CH2)n and C target are used, C target was used to
subtract the contributions of carbon nuclei in the (CH2)n
target. */
THK-TGT=XMG/CM**2'53';
/* '53' 187 and 152 mg/cm2 for (CH2)n and C target, respectively.
*/
ANL=X'54';
/* '54' Coulomb displacement energy is estimated by a liquid-drop
model. */
/* Analysis:
- In order to deduce the resonance energy of the IAS, the peak of
decay energy spectra was fitted with a Gaussian functio and a
background with a shape of a three-body phase space (see Fig.2(c)
of reference). The E(d) resolution detector acceptance and
angular distribution of 14B* were taken into account in the
fitting procedure.
*/
\\DATA,6;
INC-ENGY-LAB=74MEV/A;
EMT-1=12BE;
RSD=N;
\DATA;
COULOMB-DISP-ENGY'55' DELTA-ENGY
(MEV) (MEV)
1.62 +-0.11
\END;
/* Data taken from the text, and Fig.4 p259 in reference */
/* '55' Coulomb displacement energy for the pair of 14Be and its
IAS. In order to deduce the resonance energy of the IAS, the
peak of decay energy spectra was fitted with a Gaussian
function and a background with a shape of a three-body phase
space (see Fig.2(c) of reference). The E(d) resolution
detector acceptance and angular distribution of 14B* were
taken into account in the fitting procedure. */
\\END;