. The duration of a 90º or 180º pulse depends on the strength of the B1...
. The duration of a 90º or 180º pulse depends on the strength of the B1 field. If the 180º pulse in a proton NMR experiment requires 12.5 microsec,
a. what is the strength of the B1 field?
b. what is the duration of the corresponding 90º pulse?
Homework Answers
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. The duration of a 90º or 180º pulse depends on the strength of
the B1...
Physical Chemistry 14C.1(a) 14C. 1(a): The duration of a 90 degree or 180 degree pulse depends on the strength of the B1 field. If a 180 degree pulse requires 12.5 ms, what is the strength of th...
Physical Chemistry 14C.1(a)
14C. 1(a): The duration of a 90 degree or 180 degree pulse
depends on the strength of the B1 field. If a 180 degree pulse
requires 12.5 ms, what is the strength of the B1 field ? How long
would the corresponding 90 degree pulse require?
Exercises 14C1(a) The duration of a 90° or 180° pulse depends on the strength of the feld. If a 180° pulse requires 12.5 us, what is the strength of the B,...
At certain radio frequency (r.f) pulse field strength B_1, if the^1 H 90 degree pulse length...
At certain radio frequency (r.f) pulse field strength B_1, if the^1 H 90 degree pulse length = 12.8 mu s, what is its 45 degree pulse length? ___. iii) Assuming we measured^1H 90 degree pulse length = 12.8 mu s at certain r.f. pulse field strength b_1. If we decrease the pulse strength B_1 to only half of the original pulse field strength, what is the 90 degree pulse length now? ___. In lab 9, we measured^1H NMR spectrum and...
Referring to a typical strength-duration curve, which of the following are true? (circle all that apply) a. The rheobase current is the minimum current required to elicit a response b. The rheobase c...
Referring to a typical strength-duration curve, which of the following are true? (circle all that apply) a. The rheobase current is the minimum current required to elicit a response b. The rheobase current is equal to twice the chronaxie c. Chronaxie is the duration of stimulation at twice the rheobase current d. Chronaxie is the minimum duration required to elicit a response at maximum current e. The strength-duration curve plots the threshold current as a function of pulse duration f....
A pulsed laser emits light at a wavelength of 553.6 nm. The pulse duration is 22...
A pulsed laser emits light at a wavelength of 553.6 nm. The pulse duration is 22 ps, and the energy per pulse is 0.120 J. (a) What is the length of the pulse? mm (b) How many photons are emitted in each pulse? photons
7. Calculate the 270° pulse width for a radio frequency field strength of 200 kHz. 8....
7. Calculate the 270° pulse width for a radio frequency field strength of 200 kHz. 8. What would be an approximate radio frequency excitation band width for a 90° pulse width of 1.25 microsecond?
I. For a laser pulse with energy of l 씨, duration 100 fs and wavelength 800...
I. For a laser pulse with energy of l 씨, duration 100 fs and wavelength 800 nm forms a spot of 10 μm. Find a) Power b) Power / Area c)Electricfield, (inVienn) for|A-2Eee where μ6-4n10"h and c c) Electric field E (in V cm) for where M 4mx10" h and c 3x10"m/ 3x108m/s A 2H,c 2
Part A What is the strength of an electric field that will balance the weight of...
Part A What is the strength of an electric field that will balance the weight of a proton? Part B What is the direction of an electric field that will balance the weight of a proton? What is the direction of an electric field that will balance the weight of a proton? upward downward Part C What is the strength of an electric field that will balance the weight of an electron? Part D What is the direction of an...
Consider an experimental setup where charged particles (electrons or protons) are first accelerated by an electric field and then injected into a region of constant magnetic field with a field strength of 0.25 T
Consider an experimental setup where charged particles (electrons or protons) are first accelerated by an electric field and then injected into a region of constant magnetic field with a field strength of 0.25 T.Part (a) What is the potential difference, in volts, required in the first part of the experiment to accelerate electrons to a speed of 5.95 x 107 m/s?Part (b) Find the radius of curvature, in meters, of the path of a proton accelerated through this same potential...
7. A mode-locked Ti:Al203 laser with a cavity length of 1.5m and center wavelength of 790nm is used for optical frequency metrology. If the pulse duration is 20fs, and the laser has a hyperbolic seca...
7. A mode-locked Ti:Al203 laser with a cavity length of 1.5m and center wavelength of 790nm is used for optical frequency metrology. If the pulse duration is 20fs, and the laser has a hyperbolic secant square pulse profile a) Estimate the frequency bandwidth of the laser output.HINT: AtAf0.315 b) Estimate the number of modes in the laser output. c) If the pulse to pulse carrier envelope phase changes by 0.1rad, calculate the carrier offset frequency shift HINT: ΔωςΕ-ter d) What...
5. A square of side length 15 cm has a magnetic field of strength 0.75 T...
5. A square of side length 15 cm has a magnetic field of strength 0.75 T passing through it, at an angle of 25 degrees relative to the normal. a) What is the magnetic flux passing through the square? (12.5 pts.) b) If the angle is varied from its initial orientation of 25 degrees to one of 90 degrees relative to the normal, over a time period of 0.35 seconds, what is the induced voltage in the square loop? (12.5...
Physical Chemistry 14C.1(a)
14C. 1(a): The duration of a 90 degree or 180 degree pulse
depends on the strength of the B1 field. If a 180 degree pulse
requires 12.5 ms, what is the strength of the B1 field ? How long
would the corresponding 90 degree pulse require?
Exercises 14C1(a) The duration of a 90° or 180° pulse depends on the strength of the feld. If a 180° pulse requires 12.5 us, what is the strength of the B,...
At certain radio frequency (r.f) pulse field strength B_1, if the^1 H 90 degree pulse length = 12.8 mu s, what is its 45 degree pulse length? ___. iii) Assuming we measured^1H 90 degree pulse length = 12.8 mu s at certain r.f. pulse field strength b_1. If we decrease the pulse strength B_1 to only half of the original pulse field strength, what is the 90 degree pulse length now? ___. In lab 9, we measured^1H NMR spectrum and...
I. For a laser pulse with energy of l 씨, duration 100 fs and wavelength 800 nm forms a spot of 10 μm. Find a) Power b) Power / Area c)Electricfield, (inVienn) for|A-2Eee where μ6-4n10"h and c c) Electric field E (in V cm) for where M 4mx10" h and c 3x10"m/ 3x108m/s A 2H,c 2
7. A mode-locked Ti:Al203 laser with a cavity length of 1.5m and center wavelength of 790nm is used for optical frequency metrology. If the pulse duration is 20fs, and the laser has a hyperbolic secant square pulse profile a) Estimate the frequency bandwidth of the laser output.HINT: AtAf0.315 b) Estimate the number of modes in the laser output. c) If the pulse to pulse carrier envelope phase changes by 0.1rad, calculate the carrier offset frequency shift HINT: ΔωςΕ-ter d) What...
5. A square of side length 15 cm has a magnetic field of strength 0.75 T passing through it, at an angle of 25 degrees relative to the normal. a) What is the magnetic flux passing through the square? (12.5 pts.) b) If the angle is varied from its initial orientation of 25 degrees to one of 90 degrees relative to the normal, over a time period of 0.35 seconds, what is the induced voltage in the square loop? (12.5...
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