Gamma ray - Study guides, Class notes & Summaries

White dwarfs: properties - Remaining cores of dead, low mass stars Electron degeneracy pressure supports them against gravity Slowly fade with time Sirius and its hot WD companion White dwarfs with same mass as Sun are about same size as Earth; slowly cooling Typical density 10^6 gram / cubic cm Higher mass white dwarfs are smaller Cannot be more massive than 1.4MSun, the Chandrasekhar limit WDs in binaries: nova, supernova Type I - Mass falls toward white dwarf from binary companion ...

Coulter principle. - Answer-The ability to count and measure the size of particles using an electric circuit. Particles are moved through a small aperture, their presence causes a narrowing of the aperture, which leads to an increase in resistance.By using constant I, According to Ohms law (U= I * R), when R increases, U increases and pulse is generated. Parts and functions of the Coulter-counter - Answer-- Two spaces with a small aperture in between, capillary (contains the electrolyte sol...

Lead-based paint (LBP) correct answers Any varnish, shallac, or coating that contains either- 1.0 mg/cm2 - 0.5 % by weight - 5000 ppm - Older instruments could not read accurately at 0.7, so the lead standard was updated to 1.0 Dust sample clearance values correct answers - Floors: 40 μg/ft2 > 10 μg/ft2 (10 μg/ft2 in NY) - Windows: 250 μg/ft2 > 100 μg/ft2 (50 μg/ft2 in NY) - Window wells (troughs): 400 μg/ft2 (100 μg/ft2 in NY) - Samples must be at 1 sq ft > 2 sq ft (can be r...

MN 566 Final Exam Question 1 (2 points) Saved The clinician is assessing a patient complaining of hearing loss. The clinician places a tuning fork over the patient’s mastoid process, and wh en the sound fades away, the fork is placed without restriking it over the external auditory meatus. The patient is asked to let the clinician know when the sound fades away. This is an example of which type of test? Question 1 options: a) Weber test b) Schwabach test d) Auditory brainstem response (ABR) te...

Week 7: Gamma Rays and Microbial Genetics For this discussion, I chose Topic 1 Pro Gamma Irradiation of Food.  Would you eat gamma-irradiated strawberries?  Gamma-irradiation does extend the shelf-life but after some time, mold does begin to grow. Where does the mold come from?  Was the mold already present on the strawberries and the growth slowed by the gamma irradiation?  If gamma irradiation becomes the standard for processing produce, over time will the constant radiation e...

_________ helps with treatment decisions that are based on the histology of the disease and its extent. Classification Diagnosis Grading Staging - ️️Staging _________ is the thickness of a material required to reduce the air kerma of an x-ray or gamma ray by 50%. Half-value layer Tenth-value layer Half-life Minimum filtration equivalent - ️️Half-value layer __________ is the standard format used to transfer information between imaging systems, such as the virtual simulatio...

Short term less than 7 days CORRECT ANSWER What is Acute exposure? Agricultural Chemicals Chemical Warfare Agents Other Chemical Agent Biological Toxins CORRECT ANSWER What are toxic materials? Any exposure lasting more than 7 days. CORRECT ANSWER In short, what is chronic exposure? Human Pathogens Plant and Animal Pathogens CORRECT ANSWER What are the two types of infectious materials? Bacteria Viruses CORRECT ANSWER What are the types of human pathogens? Foot and Mouth Di...

Of what are 15O and 16O examples of? (A) Isotopes (B) Isotones (C) Isomers (D) Isobars (E) Radionuclides - ️️(A) Isotopes The anode angle (degrees) in an x-ray tube used for chest radiography is most likely: a. 15 b. 30 c. 45 d. 60 e. 75 - ️️a. 15 The difference between a 600 keV x-ray and 600 keV gamma ray photon is the: (A) Means of production (B) Position in the electromagnetic spectrum (C) Wavelength (D) Modes of interaction with matter (E) LET - ️️(A)...

Week 7: Gamma Rays and Microbial Genetics For this discussion, I chose Topic 1 Pro Gamma Irradiation of Food.  Would you eat gamma-irradiated strawberries?  Gamma-irradiation does extend the shelf-life but after some time, mold does begin to grow. Where does the mold come from?  Was the mold already present on the strawberries and the growth slowed by the gamma irradiation?  If gamma irradiation becomes the standard for processing produce, over time will the constant radiation e...

low voltage x-ray tubes are generally fitted with windows made of: - beryllium a monochromatic x-ray beam is: - a beam consisting of a single wavelength the general method of producing x-rays involves the sudden deceleration of high velocity electrons in a solid body called a: - target if it were necessary to radiograph a 7" thick steel product, which gamma ray source would most likely be used? - co-60 a co-60 gamma source has an approximate practical thickness limit of: - 9" of st...