Gorlin-goltz syndrome Shobha, B; Mosby, S; Barkha, N ...
Journal of Indian Academy of Oral Medicine and Radiology,
07/2011, Letnik:
23, Številka:
5
Journal Article
Recenzirano
Odprti dostop
Gorlin-Goltz syndrome also known as nevoid basal cell carcinoma syndrome (NBCCS) is an infrequent multisystemic disease inherited in a dominant autosomal way, which shows a high level of penetrance ...and variable expressiveness. It is characterized by keratocystic odontogenic tumors (KCOT) in the jaw, multiple basal cell carcinomas and skeletal abnormalities. This syndrome may be diagnosed early by a dentist by routine radiographic examination in the first decade of life, as KCOTs are usually one of the first manifestations of the NBCCS syndrome. This article reports the case of a 12-year-old girl with Gorlin-Goltz syndrome, emphasizing its clinical and radiographic manifestation. This study highlights the importance of health professionals in the early diagnosis of this syndrome and a multidisciplinary approach to provide a better diagnosis and prognosis.
The decay of the neutron unbound ground state of 18B was studied for the first time through a single-proton knockout reaction from a 62 MeV/u 19C beam. The decay energy spectrum was reconstructed ...from coincidence measurements between the emitted neutron and the 17B fragment using the MoNA/Sweeper setup. An s-wave line shape was used to describe the experimental spectrum resulting in an upper limit for the scattering length of −50 fm which corresponds to a decay energy <10 keV. Observing an s-wave decay of 18B provides an experimental verification that the ground state of 19C includes a large s-wave component. The presence of this s-wave component shows that s–d mixing is still present in 18B and that the s1/2 orbital has not moved significantly below the d5/2 orbital.
A previously published measurement of the ground state resonance of 10He, populated by a reaction of a 59 MeV/u 14Be beam on a deuterated polyethylene target, was further analyzed to search for 4n ...emission resulting from 2p removal. No evidence for 4n events was found. A lower limit of about 1 MeV was determined for a possible resonance in 12He.
Abstract
New neutron transmission data at resonance energies using a
$$^{197}$$
197
Au sample were measured using an early version of the Device for Indirect Capture Experiments on Radionuclides ...(DICER), which is under development at the Los Alamos Neutron Science Center (LANSCE). These data were combined with previous neutron transmission and capture data in a simultaneous
R
-matrix analysis to extract improved neutron resonance parameters for this nuclide. As a result, total radiation widths,
$$\varGamma _{\gamma }$$
Γ
γ
, were obtained for 33
$$J=1$$
J
=
1
and 44
$$J=2$$
J
=
2
$$^{197}$$
197
Au+n resonances.
$$\varGamma _{\gamma }$$
Γ
γ
distributions for these two spins states were compared to distributions calculated according to the nuclear statistical model using published nuclear level density (NLD) and photon strength functions (PSF) measured using the Oslo technique. The calculated distributions were found to be narrower and the average values for the two spins states closer together than the data. The calculation can be brought into agreement with the data by substantial modifications to the spin distribution in
$$^{198}$$
198
Au as a function of excitation energy. As far as we know, the spin distribution currently is otherwise poorly constrained. The modified spin distribution changes the shapes of the NLD and PSF extracted using the Oslo technique and so could have broad implications.
A single crystal chemical vapor deposited (sCVD) diamond detector is used as an active target to measure neutron-induced reactions on natural carbon using the neutrons produced by spallation, with a ...broad energy spectrum at LANSCE. Additionally, the neutron-induced reactions are detected in the diamond as low as E n=400 keV and up to approximately 100 MeV. Relative cross sections for C 12(n,α0), C 12(n,p0), C 12(n,d0+p1), and C 13 (n,α0) are reported up to E n=22 MeV and comparisons on detected pulse-height spectra and detector response of scattering reactions are made with GEANT4 simulations using the ENDF/B-VIII.0 evaluated nuclear data library up to 20 MeV. The results are compared with past experimental data, including other works that incorporate diamond detectors as an active carbon target. In addition, R-matrix calculations for the C 13 + n system are presented.
We report approximately half of all atomic nuclei heavier than iron are synthesized by the slow neutron-capture process. The weak component of this process is not well understood and the reaction ...rates of each isotope in the s-process path affect nucleosynthesis abundances downstream. To measure the neutron-capture cross sections of two weak s-process nuclei, 70,72Ge , using the neutron time-of-flight technique. Measuring the capture cross sections for isotopes in this region of the chart of nuclides has proven challenging due to dominant scattering cross sections. Samples consisted of pellets made of pressed enriched metallic powders. The 70,72Ge neutron-capture cross sections were measured as a function of neutron energy using the Detector for Advanced Neutron Capture Experiments at Los Alamos National Laboratory. Neutron-capture cross sections were measured from 10 eV to 1 MeV. These are the first measurements for 70,72Ge between 300 keV and 1 MeV neutron energy. Maxwellian-averaged cross sections were calculated in the astrophysically relevant neutron energy range (5 keV ≤ kT ≤ 100 keV). Their value at kT = 30 keV was found to be 89 ± 11 mb for 70Ge and 58 ± 5 mb for 72Ge. Both values are in agreement with recent time-of-flight measurements at n_TOF (neutron Time-Of-Flight facility at the European Organization for Nuclear Research). The average cross section results from this work for 70Ge show minor (< 1σ) disagreement with a recent measurement by the n_TOF collaboration at higher neutron energies. This corresponds to the neutron energy region that had previously never been measured ( > 300 keV). Two reaction library databases underestimate the 72Ge average cross section below 30 keV according to n_TOF and DANCE. This is likely due to capture resonances that are missing from the theoretical cross sections in the databases that were identified in both time-of-flight measurements. Additionally, a rudimentary analysis of the impact of both cross section measurements on stellar nucleosynthesis abundances using the NETZ nucleosynthesis tool is presented.
New neutron transmission data at resonance energies using a
197
Au sample were measured using an early version of the Device for Indirect Capture Experiments on Radionuclides (DICER), which is under ...development at the Los Alamos Neutron Science Center (LANSCE). These data were combined with previous neutron transmission and capture data in a simultaneous
R
-matrix analysis to extract improved neutron resonance parameters for this nuclide. As a result, total radiation widths,
Γ
γ
, were obtained for 33
J
=
1
and 44
J
=
2
197
Au+n resonances.
Γ
γ
distributions for these two spins states were compared to distributions calculated according to the nuclear statistical model using published nuclear level density (NLD) and photon strength functions (PSF) measured using the Oslo technique. The calculated distributions were found to be narrower and the average values for the two spins states closer together than the data. The calculation can be brought into agreement with the data by substantial modifications to the spin distribution in
198
Au as a function of excitation energy. As far as we know, the spin distribution currently is otherwise poorly constrained. The modified spin distribution changes the shapes of the NLD and PSF extracted using the Oslo technique and so could have broad implications.
PDF
