Few-MeV neutrons incident on yttrium

Budtz-Jørgensen, C.; Guenther, P.T.; Smith, A.B.; Whalen, J.

doi:10.2172/6081497

Cited by 3 publications

(5 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The state of the dentition was classified according to the number of supporting zones present using a modification of Eichner's index (Eichner, 1955) as follows (Budtz-Jørgensen et al, 1985): Group A: four supporting zones by natural teeth or bridges. Group B: three to one supporting zones B 1 B 2 B 3 ; B 4 contact on the anterior segment; Group C: no contact on natural teeth.…”

Section: Dental and Prosthetic Statusmentioning

confidence: 99%

Associations between self‐assessed masticatory ability, nutritional status, prosthetic status and salivary flow rate in hospitalized elders

1999

View full text Add to dashboard Cite

OBJECTIVES: To compare the association between self‐assessed masticatory ability and nutritional status with general health status, salivary flow and dental/prosthetic status. DESIGN: A questionnaire and a cross‐sectional clinical investigation combined with a measurement of salivary flow rates. SUBJECTS AND METHODS: A cohort of 99 elderly, non‐psychiatric patients in a geriatric hospital; clinical examination to determine dental and prosthetic status, oral health and whole unstimulated (USFR) and stimulated (SSFR) salivary flow rates, examination of anthropometric measures, serum albumin level and body mass index (BMI); questionnaire designed to produce yes or no answers related to masticatory function, nutritional status, appetite and prosthesis function; mini mental score examination (MMES). MAIN OUTCOME MEASURES: USFR, SSFR, BMI, anthropometric measures and serum albumin level; complaints related to appetite and xerostomia. RESULTS: Mean age of the 99 patients was 82.5 ± 4.04 with a MMES of >21; 50% with malnutrition of severe or intermediate degree, and 86% with moderately or severely reduced serum albumin concentration; 55% reported recent loss of appetite and 52% had symptoms of oral drynesS. Recent loss of appetite was associated with reduced serum albumin and complaints of dry mouth and lack of appetite was associated with BMI 21, 10% weight loss during the preceeding 6 months, SSFR ≤0.5 ml min‐1 and wearing dentureS. Complaints on poor retention of the maxillary denture were associated with recent weight loss and SSFR ≤0.5 ml min‐1. CONCLUSIONS: Malnutrition in hospitalized elders is primarily associated with recent loss or lack of appetite whereas complaints related to dentures are associated with poor denture quality.

show abstract

Section: Dental and Prosthetic Statusmentioning

confidence: 99%

Associations between self‐assessed masticatory ability, nutritional status, prosthetic status and salivary flow rate in hospitalized elders

1999

View full text Add to dashboard Cite

show abstract

“…''Average masses used when more than one isotope contributed significantly to OM analysis (Refs. [24][25][26][27][28][29][30][31][32][33][34]. Table 3.…”

Section: Discussionmentioning

confidence: 99%

Covariances for neutron cross sections calculated using a regional model based on local-model fits to experimental data

Smith¹,

Guenther²

1983

View full text Add to dashboard Cite

show abstract

“…Details of the total cross-section measurement methods are given in [16]. The differential-neutron-scattering measurements were made using the time-of-flight technique and the Argonne ten-angle detector apparatus [17]. The cross sections were determined relative to the concurrently measured neutron total cross section of carbon, as described in [18].…”

Section: Experimental Methodsmentioning

confidence: 99%

“…The measured cross sections were corrected for angular-resolution, multiple-event, sample-attenuation and secondneutron-source-group effects, using a combination of analytical and Monte-Carlo procedures. Details of the apparatus and the measurement method are given in [17]. The differential cross sections for the emission of inelastic gamma-rays were measured using the timeof-flight facility at the 6 MeV Van deGraaff accelerator of the National Accelerator Center at Faure.…”

Section: Experimental Methodsmentioning

confidence: 99%

“…The above fitting procedures were implemented using the analytical expression for the width-fluctuation correction given by Engelbrecht and Weidenmiiller [37], which is supported by the numerical modeling of Moldauer [38]. Using the fluctuation parameter as a fitting variable, the description of the observed inelasticscattering cross sections can be improved (increasing the degree of freedom, v, from ~1.9 to 3.0) [17]. However, the necessary increase in v seems to be essentially a pragmatic parameter adjustment with little, if any, physical justification [38].…”

Section: Physical Interpretation and Modelingmentioning

confidence: 99%

See 1 more Smart Citation

Neutron total, scattering and inelastic Gamma-ray cross sections of yttrium at few MeV energies

et al. 1984

Self Cite

View full text Add to dashboard Cite

Neutron total, scattering and (n; n',V) cross sections of elemental yttrium (89y) were measured in the few-MeV region. The neutron total-cross-section measurements were made with broad resolutions from ~0.5 to 4.2MeV in steps of <0.1MeV. Neutron elastic-and inelastic-scattering cross sections were measured from ~1.5 to 4.0MeV, at incident-neutron energy intervals of ~50keV and at ten or more scattering angles distributed between 20 and 160 degrees using neutron detection. Inelastic-scattering cross sections were also determined using the (n; n', ~) reaction at incident energies from 1.6 to 3.8 MeV at intervals of 0.1 MeV. Gamma-rays and/or inelastically-scattered neutrons were observed corresponding to the excitation of levels at: 909.0_+0.5, 1,507.4 +0.3, 1,744.5+0.3, 2,222.6_+0.5, 2,530_+0.8, 2,566.4_+1.0, 2,622.5+_1.0, 2,871.9_+1.5, 2,880. 6_+2.0, 3,067.0_+2.0, 3,107.0_+2.0, 3,140.0_+2.0, 3,410.0+2.0, 3,450.0_+2.0, 3,504.0 _+1.5, 3,514.0_+2.0, 3,556.0+_2.0, 3,619.0+3.0, 3,629.0_+3.0 and 3,715.0 _+ 3.0 keV. The experimental results are discussed in terms of the spherical-optical-statistical, coupledchannels, and core-coupling models, and in the context of previously reported excitedlevel structure.Nuclear Reactions: Measured at(n ) 0.5 to 4.2MeV, da(n)/df2 and d~r(n')/df2 1.5 to 4.0 MeV, and a(n; n', V) 1.6 to 3.8 MeV for elemental yttrium. Spherical-optical-statistical, coupled-channels and core-coupling models and level structure discussed.

show abstract

Few-MeV neutrons incident on yttrium

Cited by 3 publications

References 3 publications

Associations between self‐assessed masticatory ability, nutritional status, prosthetic status and salivary flow rate in hospitalized elders

Associations between self‐assessed masticatory ability, nutritional status, prosthetic status and salivary flow rate in hospitalized elders

Covariances for neutron cross sections calculated using a regional model based on local-model fits to experimental data

Neutron total, scattering and inelastic Gamma-ray cross sections of yttrium at few MeV energies

Contact Info

Product

Resources

About