Nondestructive identification of heavy isotopes concealed in a thick iron box has been demonstrated by using nuclear resonance fluorescence. A quasi-monochromatic photon beam produced by the collision of laser quanta with high energy electrons was used for resonant excitation of nuclear levels in (206)Pb and (208)Pb. By measuring the resonant γ rays emitted from (206)Pb and (208)Pb, each of these isotopes were clearly identified. The ratio of the effective thickness, i.e., concentration distribution, of these isotopes was deduced from the relative intensities of the measured nuclear resonance fluorescence strengths.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1063/1.3673002 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
N-acetyl-tryptophan in Acute Kidney Injury after Cardiac Surgery.
J Am Soc Nephrol
January 2025
State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, 210009, China.
Background: Cardiac surgery-associated acute kidney injury is a common serious complication after cardiac surgery. Currently, there are no specific pharmacological therapies. Our understanding of its pathophysiology remains preliminary.
View Article and Find Full Text PDFFrom Breaking Bad to Breaking Bonds-Mass Spectrometry in the Classroom.
Rapid Commun Mass Spectrom
January 2025
School of Chemical Sciences, University of Hertfordshire, Hatfield, UK.
We describe a workshop that prompts chemistry students in the final 2 years of secondary school to apply their understanding of modern analytical chemistry techniques to a 'real world' example. The scenario used is that of a forensic science laboratory that has been asked to determine the structure of an illicit compound, Revisomed (methamphetamine) being sold as a revision aid, and seized by police. Over the course of an hour, the students use a combination of infrared (IR) spectroscopy, liquid chromatography (LC), high-resolution mass spectrometry (MS) and nuclear magnetic resonance (NMR) spectroscopy data to determine the structure of Revisomed from first principles.
View Article and Find Full Text PDFA review of F-18 fluorodeoxyglucose PET/CT in the evaluation and treatment of hepatobiliary tumors.
Q J Nucl Med Mol Imaging
December 2024
Nuclear Medicine, Radiology, University of Texas Southwestern, Dallas, TX, USA.
Hepatocellular carcinoma (HCC) and biliary tract cancers (BTC) pose significant diagnostic and therapeutic challenges. Magnetic resonance imaging (MRI) and multiphase computed tomography (CT) have been the preferred imaging modalities for diagnosis, staging, and surveillance of patients with these malignancies. The best clinical outcomes depend on the appropriate selection of treatment options from the tools available in neo-adjuvant therapy, surgical resection, locoregional therapy, liver transplantation, and adjuvant therapy.
View Article and Find Full Text PDFRat models of postintracerebral hemorrhage pneumonia induced by nasal inoculation with or intratracheal inoculation with LPS.
Front Immunol
January 2025
State Key Laboratory of Traditional Chinese Medicine Syndrome, Department of Neurology, Guangdong Provincial Academy of Chinese Medical Sciences, Guangdong Provincial Hospital of Chinese Medicine, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China.
Background: A stable and reproducible experimental bacterial pneumonia model postintracerebral hemorrhage (ICH) is necessary to help investigating the pathogenesis and novel treatments of Stroke-associated pneumonia (SAP).
Aim: To establish a Gram-negative bacterial pneumonia-complicating ICH rat model and an acute lung injury (ALI)-complicating ICH rat model.
Methods: We established two standardized models of post-ICH pneumonia by nasal inoculation with () or intratracheal inoculation with lipopolysaccharide (LPS).
Metabolic changes of thalamus assessed by H-MRS spectroscopy in patients of cervical spondylotic myelopathy following decompression surgery.
Front Neurol
January 2025
Department of Radiology and Nuclear Medicine, The First Hospital of Hebei Medical University, Shijiazhuang, China.
Objective: To assess the changes of thalamic metabolites before and after surgery in patients with Cervical Spondylotic Myelopathy (CSM) using Hydrogen Proton Magnetic Resonance Spectroscopy (H-MRS) and to investigate its association with improvement in neurological function.
Methods: Forty-eight CSM patients who underwent cervical decompression surgery from December 2022 to June 2023 were included, and 33 healthy volunteers were recruited. All subjects underwent bilateral thalamic H-MRS scans before the surgical procedure, and subsequently again 6 months later.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!