[en] As a part of ''Integral-Test Program of JENDL-3T'', dosimetry benchmark test has been started in the dosimetry sub-working group, through which it is planed to produce the special purpose file for dosimetry from the JENDL-3. Presently, the 35 dosimetry reactions have been tested in the benchmark fields of Cf-252/U-235 fission spectra, CFRMF, YAYOI and JAERI-FNS 14 MeV neutron. Several systematic discrepancies have been found in the following reactions of Al-27(n,α), S-32(n,p), Fe-54(n,p), Fe-58(n,γ), Ni-58(n,p), Ni-60(n,p), U-235(n,f) and U-238(n,γ). (author)

[en] Present status of JENDL-3 Dosimetry-file has been reviewed, and generally better agreements have been obtained for the dosimetry reaction rates between calculation and experiment in several benchmark neutron fields such as Cf-252 fission spectrum. In this comparison, special attention has been paid to the uncertainty estimations of each reaction rate values. The covariance of reaction cross-section of IRDF has been tentatively applied here and the covariance of benchmark neutron spectrum has been assumed practically. (author)

[en] With a view to estimate some unknown dose values together with their accuracy from a set of foil data, a new data processing technique is presented. The technique is based on a variational representation of the dose quantity. The present technique is thought to give an approximate solution to the maximum liklihood method based on the Bayes' theorem and is also regarded as a modified FERDO method for the foil data unfoldings. Another feature of this formulation is shown in discussions of the efficient detector calibration in some standard neutron field, where a new concept ''calibration-efficiency'' is introduced through a particular error analysis of the calibration procedure

[en] The authors have initiated intraoperative radiation therapy (IORT) and intraoperative radio-frequency capacitive hyperthermia (IOHT) for unresectable pancreatic cancer. After gastric (corpus) resection, IORT and IOHT were conducted and gastro-duodenostomy was performed IORT was delivered with 12 meV electron (25 Gy) and 10 MV Linac x-ray (7.5 Gy). IOHT was done with 13.56 MHz capacitive equipment aiming 43⁰C for over 30 min along with concurrent administration of 500 mg 5-FU. Five cases were heated by the conventional method and two additional cases were heated with a newly fabricated applicator. Attained temperatures monitored directly from tumor were 38.5⁰C-44.3⁰C (over 43⁰C in four cases, 40⁰C in one case, and below 40⁰C in two cass.) Pain relief was achieved in most cases. Using the new applicators, the authors could avoid unexpected hot spots and insufficient heating

[en] A new formulation of the covariance matrix has been proposed for the uncertainty representation of neutron cross sections and spectra especially required for the dosimetry studies. Main feature of this new formulation is the inclusion of the random error using the energy resolution concept in addition to the usual systematic error. Further discussions have been made on the interpolation error and the group averaging error that can be also written based on the new formulation of the covariance matrix. (Auth.)

[en] This issue is the collection of the paper presented at the title meeting. The 20 of the presented papers are indexed individually. (J.P.N.)

[en] This issue is the collection of the papers presented at the title meeting. The 37 of the presented papers are indexed individually. (J.P.N.)

[en] This issue is the collection of the paper presented at the title meeting. The 40 of the presented papers are indexed individually. (J.P.N.)

[en] Property deterioration of the structural materials in a reactor is evaluated with the in-service surveillance dosimetry. Problems on the in-reactor dosimetry have been discussed, with a special emphasis on the neutron irradiation environments problem. The accuracy of dosimetry measurements are very much improved by the utilization of the well characterized neutron field for the calibration of detectors. The irradiation field in the reactor 'Yayoi' as a standard neutron field has been discussed, and its effectiveness on the radiation dosimetry has been cleared. (author)

[en] We have made precise theoretical calculations for both 2p_3/2→4f X-ray absorption spectroscopy (XAS) and 4d→2p_3/2 resonant X-ray emission spectroscopy (RXES) by electric quadrupole excitations at the L₃ edge of light rare-earth elements, by means of atomic model with full multiplet effects. The calculation is based on the second-order optical formula, and the effect of the incident photon polarization is taken into account. It is shown that the 4d-4f interaction plays a more important role in 4d→2p_3/2 RXES than the 4f-4f interaction does. Moreover, the calculated results of 4d→2p_3/2 RXES show the strong polarization dependence, and it is originated from the spin multiplicity, which is derived from the 4d-4f interaction, of the RXES final states