The tissue dose rate in a beam of 500 keV gmmas is 1 Gy/min. What is the photon flux in photons/cm^2/min?
The tissue dose rate in a beam of 500 keV gmmas is 1 Gy/min. What is...
please answer as much as you can, i will rate. 2. Circle the designator in front of the correct answer() from the list following each question or statenent. (o) A radioactive sample with Ti 10 hours earlier? (10 pointa 2h has an activity of I mCl sow. What wns ite activity i. 32.0 mCi ii. 10.0 mCI ii. 6.0 mCi iv. 2.0 mC v. 0.2 mC (b) The water in the primary loop of a typical PWR is used as...
2. A beam of 100 keV neutrons is sent through a tank of water (H20, p = 1 g/cm3). The neutron scattering cross-sections of hydrogen and oxygen are os(H, 100 keV) = 12.5 b, os(0, 100 keV) = 3.6 b. (a) What are the macroscopic scattering cross-sections for this beam of neutrons from the hydrogen and oxygen? (b) The neutron beam has an initial intensity of 105 neutrons/second, after passing through 2.5 cm of water, what is the beam intensity...
A 1 Curie isotropic point source that emits one 400 keV photon per decay is located at the center of a spherical tungsten shield with mass density 19.3 g/cm^3 and atomic mass 183.84 g/mol. with a radius of 2.5 cm. The microscopic cross section of the tungsten at this energy is 55 b. Determine the uncollideed scalar flux a distance of 30 cm away from the source. Negelect photon collisions outside the shield and treat it like a vacuum.
A beam of electrons with kinetic energy of 1 keV passes through a slit of width a = 1 micro-m. The electron beam is then detected on a phosphorescent scree loacted at a distance D = 1 m from the slit. What is the width W of the "image" of the electron beam?
Drug T Order: starting dose of 0.7 mcg/kg/min; titrate up by 0.5 mcg/kg/min increments to a maximum dose of 5 mcg/kg minute Supply: 50 mg of drug in 250 mL of D5W Patient's weight:219 lbs Starting dose: Starting dose: mcg/min mL/hr Titration dose Titration dose: increase the pump by mcg/min mL/hr Maximum dosemlr Maximum dosemcg/min Drug K is ordered for a patient to start at an infusion rate of 2 mcg/kg/min; increase by 1 mcgkg/min to desired effect up to...
2. Cirele the designator in front of the most correct answer from the list following each question or statement. (a) Classically, a particle of mass 1 u that has a kinetic energy of 0.5 MeV has what momen- tum? [10 points i. 1.631 x 10-20 kg m-1 ii. 1.631 x10-10 kg m s-1 ii. 3.262 x 10-20 kg m -1 iv. 3.262 × 10-10 kg m s-1 . 1.00 kg m s-1 (b) What is the mean free path length...
The standard rate of IV infusion for an adult dose of dobutamine is 20 mcg/min for every kilogram of body mass. For a patient weighing 209 pounds, what is the rate of dobutamine infusion?
QUESTION 1 1. You have a hemodialyzer with a blood flow rate of 500 ml/min and a dialysate flow rate of 800 ml/min. The urea concentration in the blood leaving the patient is 175 mg/dl. The flow of blood and dialysate is countercurrent. If the urea clearance is 410 ml/min, what is the urea concentration in the blood returning to the patient?
The Heidelberger Ionenstrahl-Therapiezentrum (HIT) has a particle accelerator capable of reaching beam kinetic energies of 500 MeV per nucleon. Instead of using protons or alpha particles, Dr. X wants to investigate the effects of high LET radiation in a tissue irradiation experiment with a 12C (A=12, Z=6) ion beam with a kinetic energy of 6000 MeV. The carbon ion beam (stripped of electrons) will be impinging on a radially symmetric (e.g. cylindrical) tissue-equivalent target. Using the Bethe-Bloch equation, calculate the...
THIS IS AN ASTRONOMY QUESTION: Question 1: An observer uses an X-ray telescope with an effective area of 500 cm^2 to search for X-ray emission lines in the spectrum of an accreting neutron star. At the energy of the target line, 6.7 keV, the continuum (arising from accretion) contributes 1.2 × 10^−3 counts/s/cm2/keV. In a spectrum accumulated over a 1 ks observation, the observer measures a total of 162 counts from within a 0.2 keV range centred on the target...